A bomb blast in the centre of the Syrian capital, Damascus, has killed at least two people, according to reports, BBC news said.

Syrian state news agency Sana said a suicide bomber had blown himself up in al-Jisr al-Abyad district, causing deaths and injuries.

The UK-based Syrian Observatory for Human Rights said two people had been killed in the attack.

The activist network said the target of the explosion appeared to be a government building.

Damascus is experiencing increasing violence as clashes between government forces and rebels in the suburbs intensify.

At least 15 people were killed and more than 30 were wounded in a suicide bomb attack at a bus station in the western Soumariya district of the capital last week, state media and activists said.