Troops have killed 20 militants in raids on a seminary and a camp in South Waziristan as part of ongoing operations against al-Qaeda-linked fighters, the military said on Monday. Eight people were killed at the seminary in Lalejai area, while 12 were killed in "hand-to-hand" fight in a separate raid on a camp in the Karam Manzai Chund Khel area, a military spokesman said in a statement. "In the Lalejai area, Maulvi Bashir's Madrassah had been serving as a hub of terrorist activities from where miscreants had been launching frequent attacks against security forces and the civil population," an ISPR spokesman said in a statement on Monday. "The stronghold was busted after fierce fighting, in which at least eight terrorists were killed," the statement added. Similarly 12 terrorists were killed in a hand-to-hand fight with security forces in Karam-Manzai Chund Khel area, where terrorists had made the local population hostage, the spokesman said. The "miscreants managed to take away bodies of six along with them while six bodies were recovered by the security forces," the spokesman said. Following a swift operation the terrorists were flushed out of Khon Khela and Draz Langer Khel area, which they were using as a second layer of their defences. The miscreants had established elaborate medical facilities in Shinkai area. During a search operation, a huge quantity of medicines and surgery related equipment has been discovered, he added. In Tangari area alone, security forces recovered over 15 tonnes of ammunition and explosives on November 19 last. The ammunition included over 900 rockets and heavy weapons like recoilless rifles and mortars.