BAGHDAD, Nov. 24 (Xinhuanet) -- A bomb planted inside a commercial building in western Baghdad detonated Wednesday, wounding four people including a police officer, witnesses said.

    The blast took place around 7:30 p.m. (1630 GMT) in the Ramadan14 Street, one of the busiest districts in the Iraqi capital.A police captain, speaking on condition of anonymity, told Xinhua that four people were injured, including a police officer.Earlier, another policeman said the officer was killed in the explosion.

    An aged woman making a phone call near the building at the time of the explosion fell to the ground because of a heart attack. Shewas then transferred to a hospital.

    The other two wounded were workers at a nearby shop.Baghdad has witnessed a wave of bomb and mortar attacks in the past few weeks when the US and Iraqi forces were tightening the noose on insurgents west and south of the city.

    A five-hour curfew, from 10 p.m. (1900 GMT) to 4 a.m. (0100GMT), is currently imposed on Baghdad. Enditem