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At least five policemen were killed and seven others injured in a suicide attack in Pakistan's southwestern city of Quetta on Tuesday, a statement from the army's Inter-Services Public Relations (ISPR) said. According to the army statement, a suicide bomber detonated his explosives-laden vest near a police van on the airport road in Quetta, the provincial capital of southwest Balochistan province, killing five policemen on the spot while injuring seven others.