Cambridge saw two nonfatal shootings Sunday, both coming to CHA Cambridge Hospital, where medical staff alerted police to their arrival.

After an early morning shooting in The Port neighborhood, a man walked into the hospital’s emergency room at around 2:30 p.m. with a gunshot wound to the hand, police said. Before he was taken to a Boston hospital for treatment, he told police that “he was walking down Market Street when someone shot him,” police superintendent Pauline Wells said. 

There’s no evidence of the story beyond his gunshot wound, Wells said, and there are no suspects.

“He was supposedly shot by someone else. He doesn’t know who it was,” Wells said.

Market Street runs for six blocks, turning from Broadway in Kendall Square to the perpendicular Elm Street, the home of the Cambridgeport School in The Port neighborhood. A man was shot just before 3:50 a.m. at the neighborhood’s Washington Elms housing, a couple of blocks south.

It’s unknown if the shootings are connected, Wells said, saying the victims weren’t very communicative and the department was understaffed during a “very tough weekend.”

Anyone with information about either Sunday incident is asked to call (617) 349-3300 or make contact anonymously.