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Security has been tightened up at Egypt's holiday resorts after ISIS killed 50 soldiers in an attack on military bases - just 250 miles from where some 9.5million tourists go every year.

Extra armed guards are protecting Sharm El Sheikh and Hurghada in the wake of last Friday's massacre in Tunisia which killed 38 people.

ISIS attacked 15 military bases in Sinai province on Wednesday, killing Egyptian forces in one of the most brazen terror attacks seen in the country for years. 

In series of coordinated attacks the terrorists used a rocket propelled grenade on a police station.

The terror group also claimed to have taken parts of Sheikh Zuweid, a town just four hours' drive from Sharm El Shiekh.

Meanwhile a British hate cleric Anjem Choudary has warned ISIS will hit Egypt's world famous Pyramids of Giza in Cairo, a UNESCO world heritage site, now they reportedly have a foothold in the country.

'When Egypt comes under the auspices of the Khalifa (Caliphate), there will be no more Pyramids, no more Sphinx, no more idolatry. This will be just,' he said.

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Armed: Security has been ramped up in Egyptian holiday resorts such as Sharm el-Sheikh (pictured in March) and Hurghada following the massacre in Tunisia and an ISIS attack on military locations in northern Sinai

Danger: Islamic State claimed to take land in Sheikh Zuweid which is just 250 miles north of towns like Dahab, Nabq and Sharm el-Sheikh - which is visited by over 10million tourists a year

Clashes: The 'enhanced security' at holiday resorts in southern Sinai, Egypt, comes after ISIS fighters (pictured) attacked military checkpoints in the north and claimed to kill over 50 Egyptian troops

Brazen: Islamic State's attacks on as many as 15 military checkpoints in northern Sinai (pictured) were seen as one of its most audacious insurgencies in years

The rise of ISIS in Egypt has put the country's holiday resorts - where 900,000 Brits holiday every year - are on high alert with armed guards on patrol around the beach and hotels.

Tourism earns Egypt £3.7billion a year and Tunisia admitted that last week's atrocity in Sousse had cost the country at least £330million in cancelled bookings. 

The Foreign Office has confirmed that 'enhanced security measures are in place to protect the Sharm el-Sheikh and Hurghada [across the Red Sea] resort areas'. 

On its website holidaymakers were advised: 'Security forces are situated at the international airports, at check points around the perimeter of the towns and throughout the Governorates. 

'Routine security checks are being performed on entry into the airport and the police are carrying out vehicle checks in the towns.'

The Foreign Office warned Brits against all but essential travel to South Sinai' region.

However, it said it was still safe to fly to the Sharm El Sheikh perimeter barrier, including the airport. 

The terror threat has prompted Poland's Foreign Ministry to advise its citizens not to travel to Egypt.

The advice led TUI Group, which owns UK-based tour operator Thomson, to cancel all trips to Egypt for the summer. 

The tour operator has offered to fly customers who had already booked to alternative destinations 

Ring of steel: The Foreign Office has confirmed that 'enhanced security measures are in place to protect the Sharm el-Sheikh (pictured in March) and Hurghada [across the Read Sea] resort areas'

Terror: The Islamist group Wilayat Sinai (pictured) - which pledged allegiance to ISIS in 2014 - has wreaked havoc in the Peninsula since 2011 

TUI said it based its decision whether on advice of Poland's Foreign Ministry - and would continue to fly Brits to Sharm El Sheikh unless the Foreign Office advises against going there.

Just four hours' drive away in the north of the Sinai Peninsula has seen in-fighting between rebel groups since the 'Arab Spring' ousting of president Hosni Mubarak in 2011. 

The Islamist group Wilayat Sinai - linked to ISIS - has wreaked havoc in the region ever since. 

It has killed hundreds of Egyptian troops and carried out a deadly bus bombing which killed three Korean tourists before pledging allegiance to ISIS in November 2014.

'What we're seeing is that Sinai Province [ISIS affiliate] has developed a real tactical proficiency,' Eric Trager of the Washington Institute told The Atlantic.

He added: 'The Egyptian military campaign in Sinai has not sufficiently weakened the organization.' 

Israeli officials are also concerned ISIS could launch a border attack on the Jewish state following the assault on Egyptian military checkpoints.

Egypt claimed 100 ISIS fighters were killed during the insurgency - with just 17 military casualties.

Government forces launched airstrikes in retaliation yesterday and killed 23 insurgents, security sources said.

In 2005, 88 people died and more than 200 were injured in an Islamist terror attack on Sharm El Sheikh. 

In February last year, four South Korean tourists were killed when a bomb was detonated on a bus full in Taba, near Egypt's border with Israel. 

Massacre: In July 2005, Sharm el-Sheikh was rocked by a series of explosions (pictured) executed by Islamist groups

Devastated: 88 people were killed - 11 of them Britons - and over 200 injured when Islamist terrorists exploded bombs in the holiday resort of Sharm el-Sheikh (pictured) in 2005

Attack: Four tourists were killed when a bomb was detonated on a bus full of South Koreans in Taba (pictured), near Egypt's border with Israel in February 2014

Precaution: An Israeli army tank (pictured) takes position along Israel's border with Egypt's North Sinai following deadly clashes near Sheikh Zuwied

The heightened security in the southern Sinai resort towns comes after a deadly attack on the popular holiday resort of Sousse in Tunisia on June 26.

Armed with an AK47 and homemade explosives, ISIS gunman Seifeddine Rezgui opened fire on a beach packed with holiday makers.

He massacred a total of 38 people - 30 of whom were British - and wounded at least 36 others.

Tunisia will lose at least £300million in tourism revenue because of the onslaught, its tourism minister claims.

Salma Loumi said on Monday: 'The attack had a great impact on the economy, the losses will be large.' 

The north African country earned around £1.25billion from tourism last year, a sector which makes up a staggering seven per cent of its annual income every year. 

Egypt saw a 28 per cent drop in tourists in 2014 and the industry has been steadily declining since the so-called Arab Spring in 2010, according to statistics released by Egypt's Ahram newspaper.

There was a 24 per cent drop in European tourists visiting the country in January and February 2014, when compared to 2013 figures. 

A spokesperson from travel agent Thomson told MailOnline: 'We understand customers may be concerned about their holiday following the tragic events in Tunisia. 

'We would like to reassure customers that their safety remains our top priority and in destinations, including Tunisia and Egypt, there are enhanced security measures in place.' 

The Association of British Travel Agents said: 'Security is already high priority in Sharm el-Sheikh for them.'

Atrocity: The heightened security in the southern Sinai resort towns comes after a deadly attack on the popular holiday resort of Sousse (pictured) in Tunisia on June 26

Killer: ISIS gunman Seifeddine Rezgui (pictured) opened fire on a beach packed with holiday makers - killing 38 and wounding at least 36