Pakistan Army's fighter planes pounded militants hideouts in South Waziristan on Friday killing at least 20 suspected terrorists, report said. The air raid was carried out in Ladha and Wana areas of the agency bordering with Afghanistan, says a private TV channel. Several militants were also reportedly injured in the attacks. Meanwhile, four security personnel were killed and 18 others injured in an explosion of remote-controlled bomb in North Waziristan agency, the channel reported.