Some people told reporters from The Associated Press and the BBC on the scene with government minders that they were happy to have food. Some said they had fled airstrikes, and others complained about treatment by the rebels.

Of those remaining in the area, some said they were afraid to leave because they expected to be arrested or mistreated on the other side. Now, though, they were worried that the army might be coming to them.

“It is very dangerous,” Yasser Hmeish, a resident, said via text message, showing a photo of himself making tea over a fire from scraps of wood from his destroyed house. “We are afraid for our families.”

A proposal by Staffan de Mistura, the United Nations envoy, for a cease-fire, aid delivery and local autonomy for eastern Aleppo in exchange for the departure of several hundred Qaeda-linked fighters has gone nowhere. Russia is now offering to talk to the United States about the departure of all rebels — several thousand fighters, some of them backed by Washington and its allies.

Tensions were rising between the Qaeda-linked group, the Levant Conquest Front, formerly known as the Nusra Front, and the other groups, according to fighters in the enclave. Some accused the Levant Conquest Front of raiding food and weapons storehouses that belonged to other groups, including Faylaq al-Sham, one of those receiving American aid. One fighter from a rival group said the looted goods had been left unguarded in the chaos.

The airstrikes in Idlib Province killed 23 people in Maarat al-Noaman, including seven members of one family, one of them a child. In Kafr Nabl, 26 people were killed, according to the Syrian Observatory for Human Rights, a monitoring group with an extensive network on the ground.

Jihad, a telecommunications engineer in Kafranbel, said that the strike had hit a busy area, and that he knew 13 of the victims.

“There is a well where people get water, and there is a bakery,” he said, asking to be identified by only his first name for safety. “There were only a few minutes between me and the strikes.”