Marie Colvin of the Sunday Times
The Prime Minister and the Foreign Secretary have paid tribute to two Western journalists, including Marie Colvin of the Sunday Times, who have been killed in an attack in the Syrian city of Homs, reports Sky News.
Award-winning French photographer, Remi Ochlik , 28, also died in the attack which is said to have targeted an opposition safe house.
David Cameron told the House of Commons: "This is a desperately sad reminder of the risks that journalists take to inform the world of what is happening and the dreadful events in Syria, and our thoughts should be with her family and her friends."
William Hague added: "Marie and Remi died bringing us the truth about what is happening to the people of Homs.
"Governments around the world have the responsibility to act upon that truth - and to redouble our efforts to stop the Assad regime's despicable campaign of terror in Syria."
Ms Colvin had been a war reporter for the Sunday Times for 20 years. Her career took her to some of the world's most dangerous conflict zones, and she continued working even after losing an eye to a shrapnel wound in Sri Lanka in 2001.
The editor of the Sunday Times, John Witherow, described her as "an extraordinary figure in the life of The Sunday Times, driven by a passion to cover wars in the belief that what she did mattered".
"She believed profoundly that reporting could curtail the excesses of brutal regimes and make the international community take notice," he added.
"Above all, as we saw in her powerful report last weekend, her thoughts were with the victims of violence.
"She was a woman with a tremendous joie de vivre, full of humour and mischief and surrounded by a large circle of friends, all of whom feared the consequences of her bravery."
Rupert Murdoch, head of News Corporation, whose UK subsidiary News International publishes the Sunday Times, said: "We are doing all we can in the face of shelling and sniper fire to get (Paul Conroy) to safety and to recover Marie's body."
Sky News' chief correspondent, Stuart Ramsay, had dinner with Ms Colvin and her photographer, Paul Conroy, who was injured in the attack, the night before they crossed into Syria.