A suicide bomber exploded when challenged by government soldiers near a Damascus mosque known as Zein Al-Aabideen, detonating his vest in a crowded civilian area to kill 9 others and injure many according to early reports. http://news.yahoo.com/syria-rebels-trade-blame-over-fragile-u-n-080944348.html

Similar attacks have already been claimed by Al-Qaeda in Damascus and other areas of Syria, where they are known locally by the name Jabhat Al-Nasra. The "Free Syrian Army" is allied with them and does not disown them because they share the same ideology and cannot disown each other.

See for example:

http://www.liveleak.com/view?i=854_1331032037 New Al-Qaeda Video Using Violent Syria Clips Applauds Violence and Jihad In Syria

http://www.liveleak.com/view?i=e6b_1330468719 AlQaeda Releases New Official Video Of Damascus Suicide Bombings