A 27-year-old New Jersey man arrested on drugs and weapons charges during a traffic stop may face additional charges after police found bomb-making materials and an assault rifle in his home when he gave them permission to search it, authorities said.

Travis Dulk, of Roselle Park, was in a car with another person when cops pulled the vehicle over on Westfield Avenue Tuesday afternoon. Authorities said they were initially stopped for not wearing their seat belts, along with other unspecified violations, but police tell NBC 4 New York authorities allegedly found a loaded handgun, hollow-point bullets and cocaine in Dulk's possession once he was pulled over.

Police say Dulk consented to an initial search of his apartment on Filbert Street after he was arrested.

During the search, police said they found bomb-making chemicals and materials, including what appeared to be canisters of black powder, several pieces of cut PVC and metal piping. They also allegedly found several disassembled firearms, an assault rifle and high-capacity magazines.

Police evacuated several homes on the block as a precaution, but residents have since been allowed to return home.

Dulk is being held in jail on weapons and drug charges in connection with his arrest stemming from the traffic stop. Authorities are investigating why he had the firearms and explosives in his home.

Information on an attorney wasn't immediately available.