Not much more is known. (source)
Update: The NYT has more.
TRABZON, Turkey, Jan. 29 — In simultaneous operations carried out in five Turkish cities on Monday, the police arrested 47 people suspected of being Islamic militants, including the leader of Al Qaeda in Turkey […]
Among those taken into custody on Monday was Ekrem K, identified as the suspected leader locally of Al Qaeda. Ekrem K, who the police said went by the name Usame, was captured in Konya, 150 miles south of Ankara, along with 22 other suspects. (source)