Unknown assailants attacked a compound of the International Committee of the Red Cross in the Libyan port of Misrata on Sunday with grenades and rockets, forcing it to suspend its work there and in the eastern city of Benghazi, the agency said.

The ICRC said seven of its aid workers were inside their residence when it came under attack. No one was hurt, but damage to the building was extensive, Reuters reports.

It was the fifth time in less than three months that violence was directed against the independent aid agency in Libya, the ICRC said in a statement, which stressed its neutrality.

"Given the circumstances, we are forced to announce, with considerable regret, that we will be suspending all our activities in Misrata and Benghazi and that our delegates in those cities will be temporarily relocated," said Ishfaq Muhamed Khan, the head of the ICRC's delegation in Libya.

Several violent incidents have rocked Libya in recent days and included the kidnapping on Tuesday in Benghazi of seven Iranians relief workers who were official guests of the Libyan Red Crescent Association.

Also on Sunday, security forces killed three armed men who were suspected of being behind seven failed bomb plots, said Saleh Darhoub, a spokesman for the National Transitional Council. It was the first deadly clash since the fall of Muammar Gaddafi in October.