Several people have been injured in an explosion on a street in the Lebanese capital, Beirut. The director-general of internal security, General Ashraf Rifi, told Lebanese television that a bomb had been placed under a car near Rue Monot. The street, filled with restaurants and nightclubs, has a bustling nightlife. The explosion came hours after US Secretary of State Condoleezza Rice left the city after a brief, unannounced visit. EEarlier reports had suggested one person had been killed and up to seven people had been wounded. The BBC's Kim Ghattas said the car had been completely destroyed by a very large blast. The motive and target of the attack remains unclear.