BEIRUT: Rebels and regime troops clashed in the Damascus district of Qadam on Wednesday, while two soldiers were killed in the northern city of Aleppo, the Syrian Observatory for Human Rights said.

The Britain-based watchdog said hundreds of youths gathered late into the night on Tuesday in the upmarket district of Mazzeh, also in the capital, and chanted anti-regime slogans.

In Syria's commercial hub of Aleppo, at least two soldiers were killed when rebels attacked a checkpoint during the night, it said, adding that loud blasts were heard in the city on Wednesday.

The Observatory said 82 people were killed in violence across Syria on Tuesday: 30 civilians, 26 soldiers and 26 rebels.