Indian investigagors have detained six more people suspected of involvement in the serial blasts in the eastern Indian state of Bihar late last month, said local media Saturday. The National Investigation Agency also seized hundreds of bank passbooks, ATM cards and other documents in Bihar's Lakhisarai district in connection with the Patna serial blasts, Indo-Asian News Service quoted police as saying. At least three other suspects have been detained earlier by police in the serial blasts case, in which six were killed and over 80 injured on Oct. 27 during a campaign rally by the opposition Bharatiya Janata Party's prime ministerial candidate Narendra Modi in the Bihari capital. Police said the home-grown militant group Indian Mujahideen was behind the blasts.