A bomb exploded in a flat in Patna's Bahadurpur housing area on Monday night.
The Bihar police said that the bombs were being made with the intention of carrying out criminal activities and the four occupants of the flat are now on the run, according to NDTV.
Police also found some timers along with two live bombs, which were defused, at the scene.
"There was a low intensity blast, two live bombs were also found which were defused later, no casualties or injuries," ANI quoted Senior Superintendent of Police Jitendra Rana as saying.
(30/03/15) Low intensity crane bomb blast took place in late night hours in Patna, no casualties reported. pic.twitter.com/iOkDcHfkDW
— ANI (@ANI_news) March 31, 2015
More details awaited.