A "sudden increase" of bombing and other military activities and a lack of humanitarian access in Syria have undermined peace talks, UN Secretary General Ban Ki-moon says.
"It is deeply disturbing that the initial steps of the talks have been undermined by the continuous lack of sufficient humanitarian access, and by a sudden increase of aerial bombings and military activities within Syria," Ban says in a speech at a UN co-hosted conference to rally financial support for Syria.
"All sides in this conflict are committing human rights abuses of a shocking scale and depravity," he says. "The situation is not sustainable ... We must end sieges and bring food to starving people."
"There is no military solution," he says. "Only political dialogue - inclusive political dialogue - will rescue the Syrian people from their intolerable suffering."