A suspect was killed and two Boston police officers were wounded in a wild, broad daylight shootout this afternoon in Dorchester, police said.

The incident began at about 1:45 p.m. near Dorchester Avenue and Shepton Street, said Boston Police Superintendent-in-Chief Daniel Linskey, when two officers from the drug control unit were observing two people.

“At some point, there was a confrontation, where the officers got out and identified themselves as police officers,” he said. “One of the suspects produced a weapon and began a gun battle with the officers.”

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The officers’ injuries were not believed to be life-threatening. Linskey said one of the officers was shot in the leg, while the other was grazed in the leg.

The suspect, in traumatic arrest, was transported to Boston Medical Center, a Boston EMS spokesman said.

Linskey said police continued to search for a second suspect. On their official Twitter account, police described the second suspect as a black male with a light complexion, a slim build, and braided hair, wearing a maroon shirt with stripes.

“We have a second individual who was present at the scene, who we are looking to speak with at this time to determine exactly the facts and circumstances” of the incident, Linskey said.

At Boston Medical Center, an army of officers blocked the entrance. Two detectives wearing blue rubber gloves emerged, carrying seven brown paper evidence bags.

Witness Fafane Cruz said she was near Dorchester and Shepton when the incident happened. Cruz said she heard an officer say, “Put down your weapon!” After that, there was a series of deep, booming shots, she said.

She also said she saw a police officer and a suspect get put into ambulances.

Two other witnesses interviewed by the Globe near the scene said they were so frightened by the brazen afternoon shooting that they would only discuss what they saw if their names and gender were not used.

Shortly before the shooting, one witness saw an SUV pull up on Shepton Street with at least three men inside. The car stopped and the men were seen pulling out large guns and opening fire, the witness said.

“I ran,” said the witness, who lives in the neighborhood.

It wasn’t clear why the witness thought three men were involved, while police have said two people were involved.

The other witness was also in the area and heard the sound of gunfire, a frightening noise that made the witness look up towards Dorchester Avenue.

At that moment, a man came running down the street, turned halfway around, and fired from a handgun as he ran. The man fired about five shots, the witness said.

“He was running and shooting,’’ the witness said. The shooter was described as a black man, about 5 feet 5 inches inches tall, wearing dark pants, a baseball cap, and a red-and-blue striped shirt. The witness ran to safety and did not know what happened later to the shooter.

The MBTA held Red Line trains at Fields Corner due to police activity in the area but said service was resuming shortly before 3 p.m.

Boston police said Dorchester Avenue would remain closed from Talbot Avenue to St. Mark’s Road until further notice for investigation. They asked residents to avoid the area.

A large crowd of residents gathered behind the police tape near the shooting scene. A large police contingent was also in the area, along with ambulances.

The mayor’s crisis response team was in the area to make sure that residents with questions and concerns have someone to talk to, the mayor’s office said.

Police asked anyone with information to call detectives at 617-343-4470. People wishing to help anonymously can do so by calling the CrimeStoppers Tip Line at 1-800-494-TIPS or by texting the word ‘TIP’ to CRIME (27463), police said.

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