Damascus: At least 20 people killed in twin bombings

At least twenty people have been killed in a twin bomb attack on a suburb of Damascus which is home to Syria's holiest Shia shrine, state media say.
Some 13 other people were wounded in the blasts, which were caused by a suicide bomber and a car bomb.
The suburb of Sayyida Zeinab, some 10km (six miles) south of central Damascus, has been a frequent target of attacks.