Libyan attacks on Misrata may be war crimes - U.N.

U.N. High Commissioner for Human Rights Navi Pillay called for a halt to the siege of Misrata and condemned the attacks, including a cluster bomb said to have exploded last week several hundred metres from the hospital in the west Libyan city.

"Under international law, the deliberate targeting of medical facilities is a war crime and the deliberate targeting or reckless endangerment of civilians may also amount to serious violations of international human rights law or international humanitarian law," Pillay said in a statement.

The rebels accuse forces supporting Libyan leader Muammar Gaddafi of using cluster bombs. The U.S.-based Human Rights Watch said last week government forces had fired the weapons into residential areas of Misrata and it had found remnants.

The Libyan government, which denies shelling civilians, has also denied this allegation.

At least two medical clinics in Misrata are reported to have been hit by mortar rounds or sniper fire, according to Pillay.

Libya's third largest city and the insurgents' last major stronghold in the west has been under siege for more than seven weeks. Rebels said they fought troops for control of a main thoroughfare there Wednesday and eight people had been killed the previous day, mostly civilians.

Hundreds of people are believed to have been killed in Misrata where aid workers say the humanitarian situation is worsening due to a lack of food, water and medical supplies.

"Using imprecise weaponry such as cluster munitions, multiple rocket launchers and mortars, and other forms of heavy weaponry, in crowded urban areas will inevitably lead to civilian casualties," Pillay said, adding that women and children were among the dead.

Pillay, a former U.N. war crimes judge, said pro-government forces besieging Misrata, including commanders, could be held criminally liable for their orders and acts. The International Criminal Court (ICC) was already investigating possible crimes.

ICC prosecutor Luis Moreno-Ocampo has said Libyan authorities decided they were ready to kill unarmed protesters opposed to Gaddafi's 41-year rule even before unrest spread from Tunisia and Egypt. He has raised concern about abductions, torture and killings.

Pillay voiced concern about mistreatment of journalists by the Libyan authorities and said at least two journalists had been killed and 16 were missing, including 10 foreigners.

"Dozens of others have been detained, assaulted, physically abused -- possibly to the point of torture -- or expelled."

(Reporting by Stephanie Nebehay; editing by Tim Pearce)