A Libyan security official says a small bomb has hit a vehicle of an Egyptian diplomat in the eastern Libyan city of Benghazi. No one was hurt.

Maged al-Urfi, Benghazi internal security spokesman, says the explosive hit the car of the deputy at the Egyptian consulate in an upscale Benghazi neighborhood that houses foreign diplomats.

The diplomat was at home at the time Monday, al-Urfi said, adding that a small amount of explosives was in the device, not enough to injure passengers.

"This is meant to send a message, not hurt," he said. He declined to elaborate.

The Benghazi blast comes a day after two car bombs exploded in Tripoli, leaving two dead and four injured. Two others were safely dismantled.

Authorities said four people were arrested, including the mastermind.