AMMAN - At least four people were killed and dozens wounded on Tuesday in ground and aerial bombardments of one of the last rebel strongholds in the Syrian capital Damascus, opposition activists said.

Numerous buildings were hit by artillery and helicopter gunfire in Hajar al-Aswad neighborhood, they said. Footage posted on the Internet by activists showed holes in buildings and rubble strewn in alleyways.

The neighborhood is one of a series of Sunni Muslim districts on the edge of the capital that have been at the forefront of the revolt against President Bashar Assad, who belongs to the minority Alawite sect.

Government forces, backed by armor, artillery and air power, have attacked a dozen Sunni districts on the outskirts of Damascus in a campaign to put down the rebellion in the capital.

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