A Syrian government official says a car bomb has exploded in a suburb of the capital Damascus, killing three people and wounding several others.

The Britain-based Syrian Observatory for Human Rights confirmed the Sunday explosion in Jouber, which it said has seen heavy clashes recently between rebels and the Syrian army. It did not have any immediate word on casualties.

It said the blast targeted a police station and was carried out by the Jabhat al-Nusra, a militant group linked to al-Qaida, but did not elaborate.

The government official insisted on anonymity because he is not allowed to make press statements.