Lebanese security forces have used tear gas to disperse some 200 demonstrators who tried to cut through the barbed wire near the US Embassy in Beirut.
The protesters, carrying Lebanese and Palestinian flags, were demonstrating against the Israeli attacks on the Gaza Strip.
Police forces first used water hoses on Sunday to disperse the demonstrations but shortly afterward fired several tear gas bombs. It was not clear if there were any injuries.
Over the past three weeks, several demonstrations have been held near the US Embassy and earlier this month five civilians and a policeman were lightly injured in a similar clash.