A human rights group charges that Syrian warplanes leveled a neighborhood in a rebel-held city, killing more than 40 people and wounding 100, including many women and children.

Associated Press reporters saw nine bodies, including a baby, after the attack on Azaz. It's in northern Syria near the Turkish border.

Human Rights Watch called the attack "horrific." It said the local hospital overflowed and closed its doors, directing casualties to the border to seek treatment in Turkey.

The group said residents fled the area in panic during the Syrian air attack. Two rebel installations nearby, a headquarters building and a detention center, might have been the Syrian air force targets, but they were not hit.

Activists say more than 20,000 people have been killed in the Syrian civil war.