BEIRUT (AP) - Activists are reporting a worsening of humanitarian conditions in Syria's biggest city, Aleppo.
They say supplies of food and cooking gas are dwindling, and power cuts are plunging homes into darkness.
Government helicopters have been pounding rebel neighborhoods across the city, which has seen 11 days of intense clashes between rebels and regime forces.
Activists say rebels have seized two police stations, while Syrian ground forces joined the helicopters in pummeling two opposition strongholds in the city's southwest.
As the bloodshed increases, the head of the Arab League is accusing President Bashar Assad's regime of atrocities. He calls them "war crimes that are punishable under international law."
The battle for Aleppo is among the most significant of the 17-month-old Syrian uprising. If the regime loses its grip on the city of 3 million people, that could be a tipping point in the civil war.