One person was killed and three others were injured in a shooting near a high school in the Dorchester neighborhood on Wednesday afternoon, the Boston Police Department said.

The Boston police commissioner, William Evans, said that the person who was killed was a 17-year-old student at Jeremiah E. Burke High School.

Myeshia Henderson, a spokeswoman for the department, said that two other people, both in their late teens, had suffered injuries that were not life-threatening. A woman in her 60s was treated for a graze wound at the scene, Ms. Henderson said.

At an afternoon news conference, Commissioner Evans said the police were canvassing the neighborhood door to door in a search for the suspect or suspects.