An accidental explosion ripped through the Nowgam police station here, killing nine people and injuring 32, Director General of Jammu and Kashmir Police Nalin Prabhat said on Saturday, while ruling out any sabotage angle. He said the blast occurred on Friday night when a specialised team was extracting samples from a large and "unstable" cache of explosives confiscated from Haryana's Faridabad district in connection with the ongoing investigation into a "white collar terror module".