Boston Police are investigating a spate of violent incidents today that has left several people injured.

Shortly after midnight, police found a severely injured man with a gunshot wound at 34 Norfolk St., near Codman Square in Dorchester. He was transported to Boston Medical Center with life-threatening injuries. No arrest has been made, and police did not give an update on the man’s condition or further details on the shooting this evening.

Then, at 9:30 this morning, two people were stabbed near Blue Hill Avenue and Stratton Street. Officers responding to a 911 call found one victim still at the scene with non-life threatening injuries; that victim was transported to Boston Medical Center. A second victim later turned up at Boston Medical Center with stab wounds that police believe were sustained in the same incident, according to spokeswoman Neva Coakley.

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Eight minutes after the twin stabbings, police responded to reports of gunfire at Blue Hill Avenue and Callender Street. No one was injured in the shooting, which occurred just steps from the scene of the stabbings. Police initially said two suspects who had fled the scene were arrested, but later said only one suspect had been arrested. Police also recovered one firearm, Coakley said.

The attacks came while the annual Boston Carnival, a Caribbean festival, is underway. In the past, the carnival has coincided with flare-ups of violence: In 1993, seven people were shot and two were run over by a car; in 2007, four were stabbed. In recent years, police have used preemptive sweeps to round up suspected troublemakers and those with outstanding arrest warrants in advance of the festival. Coakley said she did not believe such a sweep took place this year.

Shortly after noon today, revelers witnessed a shooting on Winthrop Street, Coakley said, but no suspect was identified.

Next, police responded to a stabbing at Norfolk and Withington streets around 2:40 p.m. One male victim was found injured at the scene, which is also near Codman Square. The man’s condition was not known as of early this evening, and no arrests have been made.

Another shooting took place this afternoon near the intersection of Bodwoin Street and Geneva Avenue, where police recovered ballistic evidence but found no victims and arrested no suspects.

Coakley said that despite the close proximity of some of the incidents, police so far believe they are unrelated to each other or to the festival.

Meanwhile, police continue to search for 40-year-old Damond Brown, who is suspected of kidnapping his girlfriend’s baby in the Back Bay Friday night. The baby, 7-month old Jayden Warren, was later found unharmed in an abandoned car on Mission Hill.

Brown is also wanted on outstanding assault and battery and drug distribution warrants, police said. Police described Brown as a black male, about 6 feet 1 inch tall and 225 pounds; he was last seen wearing a gray shirt, gray shorts, and green-and-white sneakers.

Police are asking anyone with information on his whereabouts to call 911.