ISLAMABAD, May 28 (Xinhua) -- In last 24 hours, seven militants were killed in Pakistan's northwest, said the military in a press release Thursday.

    Four militants were arrested in various areas of Swat in the North West Frontier Province (NWFP), said the military.

    A convoy of eight army trucks carrying relief and food destined for Chakdarra, Barikot and Mingora got ambushed near Landa Kai near Barikot, according to the military.

    Four security forces personnel were killed in the incident, it said. Despite that, the relief goods were distributed among stranded people of Mingora, the main city and Taliban stronghold in Swat.

    Ghani Ur Rehman, a known militant has been arrested by the security forces during search and cordon operation, it said. He has been involved in killing the police officials.

    Rehman used to receive 20,000 rupees (about 250 U.S. dollars) for every murder of security troops. He confessed all the charges against him during the interrogation.

    The security forces launched operations against Taliban militants late April after they refused to vacate the Buner district neighboring the Swat district of the NWFP as promised and challenged the writ of the government.