Syrian government forces have used helicopter gunships to battle rebels in the capital Damascus, activists said.

Helicopters fired heavy machine guns during overnight clashes in the neighbourhoods of Qadam and Hajar al-Aswad, the activists said.

They said Damascus has been relatively quiet since 8am after three days of intense clashes between troops and rebels.

The fighting has been the most sustained and widespread in the capital since the start of the uprising against president Bashar Assad 16 months ago.

The Britain-based Syrian Observatory for Human Rights and Damascus-based activist Maath al-Shami said the fighting concentrated in Kfar Souseh, Nahr Aisha, Midan and Qadam.

Syria's state-run news agency said today that troops are still chasing "terrorist elements" who fled from Nahr Aisha to Midan.

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