The U.S. Embassy Damascus posted the following image to Facebook on Thursday, with the note, "Here's a larger image of the Syrian regime's artillery attack on residential neighborhoods in Homs."
The Embassy also used Facebook to post a statement about the suspension of Embassy operations in Syria.
CNN quotes U.S. Ambassador to Syria Robert Ford as saying, "We know who's shelling Homs. It's not the opposition, it's the government."
"The armed opposition has rifles, machine guns, grenades, but it doesn't have artillery," he's quoted as saying. "Only one side has artillery,"
Here's a new visual report from Sky News: