Ankara, Turkey — An anti-terrorism court Friday charged a Turk with an offence amounting to treason after authorities said he acted as a link between al-Qaida and suicide bombers in attacks that killed 62 people in Istanbul last month. Adnan Ersoz, who was detained Monday, is suspected to have been involved in the planning of the four truck bombings after meeting with Osama bin Laden, an intelligence official said. Mr. Ersoz confessed he underwent explosives training in al-Qaida camps in Afghanistan in 2001 and 2002, the intelligence official said, speaking on condition of anonymity. Mr. Ersoz told a court Friday...