A car bomb exploded near the headquarters of the Libyan opposition’s National Transition Council in the eastern city of Benghazi on Tuesday.
The bombing happened just 200 metres from the rebels’ HQ. No casualties have been reported, but nearby buildings were damaged.
It was the first car bombing in Benghazi since anti-regime protests began in mid-February. The city, along with most other eastern cities and towns, has been under rebel control since then.
In New York, The UN special envoy to Libya told the Security Council that both sides want a ceasefire. However, the rebels insist they will not negotiate with Gaddafi or his family.
The developments come as a regime-set deadline for rebels to lay down their weapons in the besieged town of Misrata expired overnight.
Anti-Gaddafi forces say they are braced for more attacks, a day after shelling killed 14 people there.