DAMASCUS, Syria – President Bashar al-Assad pledged in an interview broadcast Monday to honor an agreement to surrender Syria’s stockpile of chemical weapons, but he said that rebels might try to block international arms inspectors from doing their work.

As battles continued across Syria, new Associated Press video of an attack Sunday night showed the regime’s helicopters dropping barrel bombs on opposition-held areas, creating chaotic scenes of destruction.

In a sign of worsening infighting among the rebels, a top al-Qaida commander in Syria was killed in an ambush by a rival, Western-backed group – an assassination sure to raise tensions among factions seeking to topple the regime.

Assad’s comments came as world leaders gathered in New York City for the annual U.N. General Assembly, where the use of chemical weapons in Syria’s civil war was high on the agenda.

The Syrian leader told Chinese state TV that Damascus is dedicated to implementing the agreement reached between Russia and the United States to surrender its chemical weapons to international control. Syria’s stockpile, he said, is “in safe areas and locations and under the full control of the Syrian Arab Army.”

Assad cautioned, however, that the rebels might block inspectors from reaching some of the locations, in order to frame the government.

“I’m referring to places where gunmen exist. Those gunmen might want to stop the experts’ arrival,” Assad told CCTV in the interview, which was recorded Sunday in Damascus and broadcast Monday.

Under the agreement brokered Sept. 14 in Geneva, inspectors are to be in Syria by November, and all components of the chemical weapons program are to be removed from the country or destroyed by the middle of next year.

Ralf Trapp, a former chemical arms inspector who is now a disarmament consultant, said Assad was legally obligated to let in inspectors under the chemical weapons treaty. But, he cautioned, “they can use the security situation as an excuse. They can delay things.”

Damascus met a first deadline under the Geneva agreement, submitting last week what was supposedly the full list of its chemical weapons and production facilities to the Organization for the Prohibition of Chemical Weapons so they can be secured and destroyed.

The U.S.-Russian deal has dealt a blow to the rebels, who had hoped that a U.S. military strike would turn the war in their favor.

Opposition leaders have warned that the regime will continue to wield conventional weapons in the civil war, which has killed more than 100,000 people since the uprising began in March 2011.

Fierce fighting between regime forces and rebels Monday included an airstrike that killed at least six people from the same family in central Hama province.

AP video showed a helicopter dropping explosives Sunday evening on the village of Habit, followed by pandemonium as civilians and fighters with flashlights searched frantically for survivors in the rubble.

Regime forces are fighting Sunni rebels in the Hama area to keep them from advancing on villages inhabited by Alawites, members of Assad’s minority sect, an offshoot of Shiite Islam.

In the latest fighting between rebel factions, the group known as the Islamic State of Iraq and the Levant, an al-Qaida offshoot, said its commander in Idlib province, Abu Abdullah al-Libi, was killed in an ambush by members of the Free Syrian Army who opened fire on his car near a border crossing with Turkey on Sunday.

The statement was posted on a militant-run website.