Only bombers were killed in two failed suicide attacks in southern Afghanistan on Friday. With the fresh assaults, the number of suicide attacks rose to four during the past three days. Friday's attacks were carried out in two provinces of Kandahar and Paktia but officials say only one constable was injured. Targets of both the attacks were convoys of the Afghan army and police. The first suicide attack was carried out in the Kandahar province, where a bomber tried to detonate himself amid a military convoy, said a senior military officer General Rahmatullah Raufi. He said only the bomber, believed to be an al-Qaeda member, was killed in the explosion. The soldiers were unhurt. Hours after the first attack, another such blast was reported from the Paktia province, where a Taliban militant blew himself up to target some police constables. A local officer said no sooner did the policemen rush to arrest the suspect than he stepped back and there was a big explosion. The body of the bomber was mutilated beyond recognition. One policeman suffered injuries in the attack, who was rushed to a military medical facility in the province.