Nearly 450 kg of explosives were seized by the Special Task Force of Bihar police, from two places in Gaya district, in the wee hours of Thursday.Acting on a tip off, police raided a shop at Kaulakhshni area in Gaya and seized 29 gunny bags containing explosives, Superintendent of Police S M Khopade said. The STF also raided a house under Delha police station in the district and recovered 70 sacks of explosive materials, Khopde said.