UNITED NATIONS - UN SECRETARY General Ban Ki Moon condemned a suicide attack on a UN office in Afghanistan on Saturday and praised the prompt response by Afghan and international forces.

There were no casualties among UN workers in the attack, which officials said was carried out on the global body's office in the western city of Herat by four suicide bombers wearing police uniforms and burqas.

Three guards were wounded in the incident, they said. A spokesman said Mr Ban 'strongly condemns the suicide attack earlier today against the UN compound in the western city of Herat, Afghanistan.'

He also 'wholeheartedly commends the immediate in extremis support rendered by units of the Afghan National Security Forces and International Security Assistance Force (Isaf) whose prompt action stabilised the situation and undoubtedly saved the lives of United Nations staff members in the compound.'

'The United Nations will continue to maintain its presence and programmes in Herat for the benefit of the population in need and in support of the Afghan authorities,' his spokesman said in a statement.

UN chief condemns attack