A man was seriously injured after being shot in the head in Lower Mills just before 5 p.m.

The young man was shot in the CVS parking lot at intersection of Dorchester Avenue and Richmond Street. The man is in critical condition, police said a press conference held at the scene just after 7 p.m. He was transported to Boston Medical Center.

Boston Police called in the homicide unit to investigate. The shooting is believed to be gang related, police said. Eyewitnesses, who reported seeing the crime occur, said four gunshots were fired.

Shooting near Lower Mills Library and CVSEyewitnesses say it was 15 yards away from the entrance to Lower Mills Library, a polling location for two precincts: 17-13 and 17-14.

The polling location remained open, though voters were instructed to access the library through an alleyway behind ester restaurant on Dorchester Avenue. A steady stream of voters continued to make their way into the library branch using that route, with volunteers and poll workers directing them.

"We see no evidence that this would slow turnout in any way," said State Rep. Dan Cullinane, who went to the polling location shortly after learning of the shooting. He, State Senator Linda Dorcena Forry, and Boston Police Captain Richard Sexton were on-hand to assist at the polling location following the shooting, and were in touch with the police commissioner and the city's elections department. A number of volunteers from Dorcena Forry's campaign were staged along Dorchester Avenue and Washington Street to direct voters around the crime scene and into the polling location.

Richmond Street was shut down between Dorchester Avenue and Washington Street, with traffic congestion throughout the neighborhood.

Turnout has been high at the polling location throughout the day. As of 6 p.m., just over 1,000 people turned out to vote at the library's two precincts according to the city's elections department.