The opposition has said that those targeted were members of the Berri clan, a family with close ties to the government. Among those reportedly killed was the clan leader, Zeino Berri. Rebels accused him and others of committing atrocities against civilians. But the executions drew condemnation of the rebel forces. Several opposition groups also publicly denounced the killings.
"Such reprisals are never justified," Nadim Houry of Human Rights Watch said on Twitter.
Some reports indicated that the targeted clan has thousands of followers who could seek revenge, adding to the hostilities in Aleppo.
Rights monitors have documented extrajudicial killings and other abuses by both sides during the Syrian uprising.
Syria's military has suffered heavy losses and numerous defections that have strained its capabilities. A United Nations-commissioned report in June concluded that "regular forces are exhibiting a certain fatigue."
Still, the military retains a substantial edge in training and weaponry compared with the various rebel militias, which are mostly lightly armed, contain many untrained civilians and have no central command.
Government troops and rebels are fighting for control of Aleppo, Syria's most populous city, in what could be a decisive battle in the almost 17-month uprising against Assad's rule.
The U.N. confirmed Wednesday that the military had deployed jets firing rockets and machine guns at rebel positions in Aleppo. The opposition says the government has also used helicopter gunships and artillery to pound rebel-held districts. Rebel commanders say they hope that using guerrilla-style tactics in a dense urban landscape will help neutralize the army's advantage in firepower.
The fight for Aleppo has been brutal and bloody, featuring street fighting for control of neighborhoods and strategic installations such as police stations. Both sides appear to be preparing for a battle that could last weeks.
Tens of thousands of Aleppo residents have fled the city, but aid groups say many people remain trapped. Thousands are said to be living in schools, mosques and parks and at other sites. Aid groups worry that a humanitarian disaster will arise if the combat and shelling spread to other districts of the sprawling city, long Syria's commercial hub.
In Washington, U.S. officials disparaged Assad for keeping his whereabouts unknown since a bombing killed four of his top aides July 18.
"His recent remarks show him for the coward that he is," said Jay Carney, White House press secretary. "He hides out of sight, encouraging the heavily armed Syria military to continue slaughtering civilians in his name."
Source : http://articles.latimes.com/2012/aug/01/world/la-fg-syria-aleppo-20120802