A volunteer trolley conductor was injured after getting pinned between two streetcars near the Lake Harriet Band Shell on Friday evening, officials said.

The adult male driver, who is in his 70s and has not been identified, was helping attach two train cars around 7 p.m. when one car accidentally lurched forward, trapping his body between them. He was eventually unpinned and taken to Hennepin County Medical Center, where he remains in critical but stable condition, said Dawn Sommers, spokeswoman for the Minneapolis Park and Recreation Board.

Sommers said this is the first injury involving a trolley that she can recall in her 10-year tenure with the Park Board.

Family members at the scene declined to comment, calling the incident an accident.

Aaron Isaacs, chairman of the Minnesota Streetcar Museum, said the Como-Harriet Streetcar line, which operates between Lake Harriet and Lake Calhoun, was closed after the incident Friday evening but would reopen Saturday on its regular schedule. Isaacs declined to elaborate on the circumstances that led to the incident.

The museum is a nonprofit, all-volunteer organization that provides historic train rides for $2 per person lasting about 15 minutes. The streetcar station in Minneapolis is owned by the Hennepin County Historical Society.