A joint team of the Border Security Force and the Chhattisgarh police on Friday busted a bomb-making unit of the banned Communist Party of India - Maoist and seized around 300 kg of explosives and equipment used for assembling IEDs. A joint team of the BSF, Special Task Force and Kanker district police raided a Maoist hideout in the forest between Beenagunda and Uchhekoti villages in Abuzamad area, where they came under hostile fire, said Kanker district police chief.