Syria's new security forces checked IDs and searched cars in the central city of Homs on Thursday, a day after protests by members of the Alawite minority erupted in gunfire and stirred fears that the country's fragile peace could break down.

A tense calm prevailed after checkpoints were set up throughout the country's third-largest city, which has a mixed population of Sunni and Shia Muslims, Alawites and Christians.