A wounded British photographer who escaped the besieged Homs district of Bab Amr said on Friday that the month-long bombardment of the district was "an indiscriminate massacre".
Paul Conroy, 47, was speaking from a hospital bed in Britain, where he returned a couple of days ago after being smuggled to Lebanon on Tuesday.
"It's not a war, it's a massacre, an indiscriminate massacre of men, women and children," he told Sky News television.
The former soldier said Syrian government forces had begun their attacks at 6:30 every morning, "systematically moving through neighbourhoods with munitions that are used for battlefields... there were no targets".
He described the humanitarian situation as "more than a catastrophe", saying there was no power or water, and food was scarce.
"There's still thousands of people in Homs... they're living in bombed-out wrecks, children six to a bed, rooms full of people waiting to die," he said.
"They see no relief, nothing, other than waiting for the moment the soldiers come in, or the shell comes through the door."