SWAT - Three troops were injured when a suicide bomber blew himself up in Butkhaila area of Malakand Saturday. The bomber blew himself up when the security forces raided a house to arrest the suspected militants but one of them blew himself up instead of surrendering to the forces. The security forces launched a search operation on a tip-off in Butkhaila area to arrest the suspected militants. The sources said that the militants also opened fire on the security forces, injuring a person of the security forces. The wounded personnel were rushed to the nearby hospital for treatment where their condition was stated to be out of danger.