BEIRUT (AFP) –  6 Sep. 2016- Dozens of people had to be treated for breathing problems in the Syrian battlefront city of Aleppo after regime helicopters dropped barrel bombs on a rebel-held district Tuesday, a monitor said.

The Britain-based Syrian Observatory for Human Rights said the bombs hit the Sukkari neighbourhood and that more than 70 people, “most of them civilians”, were left choking and needed treatment.

The opposition Aleppo Media Centre charged on its Twitter account that Sukkari was the target of a chlorine attack.

Observatory head Rami Abdel Rahman said that no one was killed in the strikes.

A Sukkari resident told AFP a “very strong smell” filled the neighbourhood after it was hit by a barrel bomb and that he and others had difficulty breathing.

Last month, an investigative panel set up by the UN Security Council said in a report that  Bashar al-Assad’s forces had carried out at least two chemical attacks, one in 2014 and another in 2015.