Five explosions were heard near the compound of Libyan leader Moamer Gaddafi as NATO planes bombed targets in Tripoli overnight, media reports said Friday.
Smoke was seen rising late Thursday from Gaddafi's Babal-Aziziyah base, the broadcaster Al Jazeera said.
Earlier Thursday, Libya's government called for a ceasefire and unconditional talks with the opposition, DPA reported.
Prime Minister Al-Baghdadi Ali al-Mahmoudi reportedly contacted several countries about the plan, including Spain.
The ceasefire offer was based on an African Union plan to end the three-month conflict.
The plan does not mention the future of Gaddafi. A key demand of the opposition is that Gaddafi stands down.
The United States did not see the offer as credible, according to White House deputy national security adviser Ben Rhodes, speaking in France.
He said the US would continue its military campaign because forces loyal to Gaddafi were still attacking population centres and not complying with UN demands.