The National Investigation Agency (NIA) may take over the probe into the Mahabodhi temple blasts if the Bihar Police fail to find any crucial leads in the next few days.
Although it has been two days since 10 low-intensity explosions took place in the temple complex and left two monks injured, police investigation is yet to yield any breakthrough.
However, the involvement of terror outfit Indian Mujahideen (IM) to avenge the attack on Rohingyas by a section of Buddhists in Myanmar earlier this year is not ruled out. No group has claimed responsibility for the blasts.
Bihar Police on Monday released the CCTV footage of the blasts and said this would help them find possible suspects. They also detained one Vinod Mistri, who is suspected to have IM links in Kolkata.
According to sources in the police, three more suspects have been identified and teams sent out to trace them.
Meanwhile, the ministry of home affairs said the CCTV footage had not thrown up any leads on who planted the bombs.
Bihar chief minister Nitish Kumar has already acknowledged that the state government had intelligence inputs about a possible attack on the temple.
"We had some inputs and took action but no one can claim to prevent all terror attacks," he said on Monday.
In the last nine months Bihar was repeatedly warned, at least twice by the Intelligence Bureau and once by the Delhi Police, with specific alerts about Bodh Gaya.
Forensic teams of the National Security Guards (NSG) found that analogue clocks were used as timers in the bombs. The manufacturer of the clocks has been identified. The NSG has also found that explosives used in the bombs were a mix of ammonium nitrate, sulphur and potassium and that gas cylinders were used as containers
Police have also found some markings on the cylinders, which are possibly instructions to operatives on where to place the bomb. It seems the bomb planters were not well versed with the temple topography.