Two award-winning photographers have been killed while covering the conflict in the Libyan city of Misrata.
Tim Hetherington, 40, who had dual British and US nationality, is said to have been killed in a rocket-propelled grenade attack.
Chris Hondros, 41, of the US, was also killed and two others, including Briton Guy Martin, were injured in the attack on Wednesday, the BBC reports.
Hundreds of civilians have died in the besieged city in past weeks as opposition forces battle supporters of Libyan leader Muammar Gaddafi.
In March, NATO agreed to take over the responsibility of enforcing the a United Nations-sanctioned no-fly zone over Libya from western forces.
Tim Hetherington was best known for the Oscar-nominated film Restrepo which followed an American unit during its combat tour in a remote valley in Afghanistan.
While in Benghazi recently, Mr Hetherington told a colleague of his strong desire to follow the story in Libya and to document what is happening.
The BBC reports in a message on Twitter shortly before he died he said: "In besieged Misrata - indiscriminate shelling. No sign of NATO."
Chris Hondros won the Robert Capa Gold Medal for war photography and was based in New York for Getty Images.
The photojournalists were among 10 people killed on Wednesday alone, as the death toll in the city mounts. Doctors at the hospital say they have treated more than 100 casualties so far, mostly civilians.
The BBC says one of the reasons Misrata has become a big international issue in the last few weeks is that journalists have been getting in by boat and emerging with stories of what's happening.
One medic told a BBC correspondent that he and his colleagues were exhausted by death and by blood, and asked where the international community was.
