Stones were hurled at the vehicle of Bihar Labour Resources Minister Arun Shankar Prasad on Monday while he was on his way to visit the house of an accident victim, police said.
The windshield of the vehicle was damaged but the minister was unhurt as he was at the gate of the victim's house.
The incident took place on Sunday evening when the minister visited Tahar village in Khajauli police station area as the local MLA to offer condolences to the family of a person killed in a road accident on Friday night, a police statement said.
"During the visit, some anti-social elements provoked a group of women present at the spot and positioned them in front of the minister's vehicle. The group allegedly began raising demands and damaged the vehicle's windshield by throwing stones.
"Police personnel deployed at the scene ensured the minister's safety and escorted his vehicle away from the area," the statement said.
Senior police officers, including the DIG (Mithila Range) and Madhubani superintendent of police rushed to the spot.
The officers reviewed the situation and also met the minister.
All those allegedly involved have been identified and a case has been registered at the police station concerned, it said.
A special investigation team has been constituted to apprehend the accused.
Raids are underway to arrest the accused, police said.
(With inputs from PTI)