Two Britons of Iraqi origin have been detained at an airport in southwest Turkey on charges of spreading "terror propaganda for outlawed Kurdish militants.

Brothers Ayman Barzan and Hariam Barzan were held on Thursday at Dalaman airport after they were interviewed by anti-terror police over their "suspicious behaviours".

Police later checked their social media accounts where they allegedly shared messages in support of the Kurdistan Workers' Party (PKK) and the Syrian Kurdish People's Protection Units (YPG) militia, DHA said.

Turkey considers the YPG as the Syrian branch of the PKK - which has waged a bloody insurgency against the state since 1984 and is blacklisted as a terror group by Ankara and its Western allies.

The two brothers, who were detained by police, were later placed by a local court in pre-trial detention.

Miran Hassan, a friend of the brothers, said they were in Turkey visiting their sister, who had come over from neighbouring Kurdistan in northern Iraq.

Turkey has previously arrested a British volunteer with the YPG in Syria, while on holiday with his fiancee in Bodrum.

Joe Robinson, 25, from Lancashire, was detained in August 2017 after posting pictures on social media allegedly showing himself in camouflage gear taking part in YPG operations in Syria.

He was released on bail three months later.