In another major haul within a week, Mumbai Police seized over 345 kg marijuana or 'ganja' valued at around Rs 52 million, officials said here on Friday. Following a tip-off regarding a huge consignment of contraband hidden in a building in Sangharsh Nagar, a Chandivali suburb in north-east Mumbai, a team of Saki Naka police station raided the premises, Deputy Commissioner of Police (Zone 10) Maheshwar Reddy said. The 'ganja' was found hidden in a small flat in building no. 10 in the Slum Redevelopment Authority complex. The team scrutinized CCTV footage from the area and zeroed in on 39-year-old Ashok M Metre, who was arrested and booked under the NDPS Act, said Reddy.