"After questioning two arrested Maoists earlier this month, the team has come for further investigations," Superintendent of Police of Hazaribagh Manoj Kaushik said.
The district police would provide all assistance to the NIA team comprising a deputy superintendent of police and an inspector in their investigations, he added.
The NIA has been investigating ever since the district police had arrested two Maoists and seized M-16 Rifle used by the US Army and British manufactured bullet proof jacket on August 29.