At least four militants were killed and six others were arrested in a clash with security forces in Dera Bugti, officials said on Wednesday. According to Balochistan Frontier Corps (FC) spokesman, gunmen ambushed a convoy of security forces in the Sangsila area of Dera Bugti. He said four attackers had been killed and six others were arrested after an hour of firefight. He said the security forces recovered a large number of weapons from the militants, adding that a large number of FC had been deployed in the area.