Two Syrian nationals suspected of having links with al-Qaeda have been arrested in Turkey.
Al-Qaeda is suspected of having aided the Istanbul bombers
Luai Sakra, 32, is suspected of involvement in the November 2003 bombings of UK and Jewish targets in Istanbul which killed 63 people.
He was arrested in Diyarbakir, south-east Turkey, and is due to appear in court in Istanbul on Thursday.
A suspected associate of his, Hamed Obysi, 21, was detained in the southern Mediterranean province of Antalya.
Local media reports say both men were detained after forged passports were discovered in a flat in the provincial capital, which is also called Antalya.
A total of 71 men are being tried in connection with the two 2003 attacks on two synagogues, the British consulate and a British-owned bank.