Blast rocks hotel in Benghazi

A car bomb exploded in the opposition-held city of Benghazi, just outside a hotel used as a base by foreign diplomats and journalists.

Explosions have also been heard in Tripoli where NATO bombers have carried out more airstrikes on Libya's capital.
 
Meanwhile a UN report has accused both sides of war crimes.
  
Al jazeera's Sue Turton reports from Benghazi.