An explosion today damaged a car that was passing the Beirut headquarters of security forces who have carried out a crackdown on Christian dissidents.
Security forces said they were questioning the driver of the car, who was unharmed. Witnesses said the blast resonated through a crowded residential and commercial district in the mainly Christian east Beirut.
Security forces earlier this month arrested more than 200 supporters of jailed Lebanese militia leader Mr Samir Geagea and exiled army general Michel Aoun, both of whom are bitterly opposed to Syria's political stranglehold on Lebanon.
The army has accused some of those detained of working with Israel to undermine Lebanon and Syria, and many of those detained face charges of endangering the country, defaming the Syrian army and slandering Lebanon's pro-Syria president, Emile Lahoud.
Maronite Christians have spearheaded a campaign to remove the 20,000 troops Syria keeps in Lebanon, and many Christians resent a Syrian-inspired post-war political settlement that diminished Christian influence in favour of Muslims.
Two Syrian workers were killed and a third wounded earlier this month when an unidentified assailant threw a grenade at them in central Lebanon.
Security forces on Sunday said two Syrians were killed and a third hurt while tampering with a grenade in an apartment in east Beirut.