Suspected ISIS extremist arrested at Heathrow Airport

Man held on suspicion of terrorism

A photographer holding his picture of the Arc du Triomphe (Triumph's Arch) taken on March 14, 2014 in front of the remains of the historic monument after it was destroyed by ISIS in October 2015 in the ancient Syrian city of Palmyra. AFP

Iraqi men look at a crater left by a massive suicide car bomb attack carried out the previous day by ISIS in the predominantly Shiite town of Khan Bani Saad, 20km north of Baghdad, on July 18, 2015. AFP

A Syrian man walks past a minaret destroyed following an alleged air strikes by Syrian government forces in the ISIS controlled Syrian city of Raqqa, on November 25, 2014. AFP

Men, suspected of being affiliated with ISIS, gather in a prison cell in the northeastern Syrian city of Hasakeh on October 26, 2019. AFP

A member of the Syrian Democratic Forces (SDF) stands guard in a prison where men suspected to be affiliated with ISIS are jailed in northeast Syria in the city of Hasakeh on October 26, 2019. AFP

A woman stands in front of a bullet riddled facade in the northern Syrian city of Raqqa, the former Syrian capital of ISIS, on August 21, 2019. AFP

A fighter with the Syrian Democratic Forces (SDF) monitors on Surveillance screens, prisoners who are accused of being affiliated with ISIS, at a prison in the northeastern Syrian city of Hasakeh on October 26, 2019. AFP

A general view shows blankets hanging across the road for protection from sniper fire in the Hamidiyeh neighbourhood of the northern Syrian city of Aleppo as local popular committee fighters, who support the Syrian government forces, try to defend the traditionally Christian district on the third day of intense battles with ISIS on April 9, 2015. AFP

An undated image, which appears to be a screenshot from a video and which was published by ISIS in the Homs province (Welayat Homs) on August 25, 2015, allegedly shows smoke billowing from the Baal Shamin temple in Syria's ancient city of Palmyra. AFP

The house of local farmer Hamad al-Ibrahim is seen destroyed in the eastern Syrian village of Baghouz on March 13, 2020, a year after the fall of ISIS. AFP

A picture taken on January 13, 2020 during a press tour organised by the US-led coalition fighting the remnants of ISIS, shows a view of the damage at Ain al-Asad military airbase housing US and other foreign troops in the western Iraqi province of Anbar. AFP

A bridge that was destroyed by ISIS after they took control of the river crossing and rebuilt the bridge as US-backed Kurdish and Arab fighters advance into ISIS's bastion of Manbij, in northern Syria, on June 23, 2016. AFP

Iraqis look at the damage at aftermath scene of a mortar and bombing attack on the Sayyid Mohammed shrine in the Balad area, located 70km (around 45 miles) north of Baghdad, on July 8, 2016. AFP

Part of the remains of Arch of Triumph, also called the Monumental Arch of Palmyra, that was destroyed by ISIS in October 2015 in the ancient Syrian city of Palmyra, after government troops recaptured the UNESCO world heritage site. AFP

Iraqi Kurdish and Turkmen Shiite forces sit in the northern Iraqi town of Bashir after they recaptured the town from ISIS on May 1, 2016. AFP

A man has been arrested at London's Heathrow Airport on suspicion of terrorism and being a member of ISIS.

The suspect, 25, from High Wycombe in Buckinghamshire, was held on Wednesday as he arrived back in the UK for alleged offences linked to extremism.

He is suspected of having committed crimes including preparing for acts of terrorism, membership of a banned organisation, namely ISIS, and receiving weapons training.

The man was arrested after an investigation by officers from Counter Terrorism Policing South East.