US Secretary of State John Kerry has condemned the deadly hospital attack in Aleppo, saying the United States won't accept violence against civilians. Meanwhile, he noted the US and Russia are working on details to include Aleppo in a new broader ceasefire deal.

"We condemn any of these attacks no matter who commits them and we urge all of the parties to be responsible and to take immediate steps to halt the violence that is plaguing so much of the country,"

"Foreign Minister Lavrov and I yesterday discussed the need to reaffirm the cessation in Aleppo as soon as possible, we are in agreement on that and let me emphasize that today Foreign Minister Lavrov reiterated that there is no solution to this other than at the negotiating table,"

"Our teams are engaged in these conversations so that we can try to establish a more sustainable mechanism than what was put in place previously," said Kerry.