The United Nations deployed a long-awaited fact-finding mission to Libya on Wednesday.
A three-member panel is tasked with investigating alleged human rights abuses by Moammar Gadhafi and his regime, during the popular uprising.
The findings of the investigation will be presented to the U.N. Human Rights Council in June and it includes Gadhafi's use of air strikes against civilian targets, and his use of mercenaries to kill civilians.
The U.N. team arrived in Libya amidst heavy fighting between forces loyal to Gadhafi and opposition fighters.
On Wednesday, the already battered eastern Libyan city of Misrata came again under heavy shelling by Gadhafi troops.
Although opposition fighters have gained control over some parts of Libya in the past few weeks, the situation remains at a standoff.