Libya crisis in maps: Day by day

Thursday 31 March

Rebels continue to pull back from recently captured towns of Ras Lanuf and Bin Jawad along the eastern coast. A column of retreating rebel fighters came under heavy fire between Brega and Ajdabiya.

The rebel-held town of Misrata is still reportedly coming under attack from pro-Gaddafi troops.

Nato took sole command of international air operations over Libya. It said it had the means to enforce the UN resolution.

The alliance also said it was investigating reports of civilian casualties in Western air strikes on Tripoli.

A senior Vatican official in Tripoli, said witnesses had reported 40 civilians had been killed in strikes by Western forces on the city.