BOSTON — A Chelsea man who went on a violent 2024 bank robbery spree — threatening to “blow this place up” and “kill you all” — has pleaded guilty in federal court.

Keywan Kelly, 30, admitted to three armed bank robberies across Weymouth, Jamaica Plain, and Hyde Park, each more theatrical and terrifying than the last. Prosecutors say he wore gloves, masks, and brandished a firearm at each job — at one point claiming he had four bombs and demanding $20,000 in cash.

The first heist happened on July 1, 2024, when Kelly stormed into a Bank of America in Weymouth, shoved a handwritten threat note toward the teller, and pulled out a gun. The note demanded $20,000 — and Kelly doubled down with verbal threats: “Run that s**t before I blow this place up” and “I’ll kill all of you.”

The teller complied, handing over roughly $19,000 in total. It wasn’t enough.

Fifteen days later, on July 16, Kelly struck again — this time in Jamaica Plain at Rockland Trust. He wore a black balaclava, gloves, and handed the teller another threat: “I have 4 bombs. I’ll kill everyone. Make quick.” He fled on foot with just $2,480.

On July 26, Kelly hit a Hyde Park Rockland Trust branch, repeating the formula. Mask, gloves, gun, and threats. He told the teller to hand over $20,000 or he’d shoot. He left with about $3,000 in cash.

The FBI, Boston Police, and Weymouth PD all worked the case, eventually zeroing in on Kelly through surveillance footage, fingerprints, vehicle tracking, and cellphone data that placed him near each robbery.

Now convicted, Kelly faces up to 25 years in federal prison for each count. Sentencing is scheduled for November 12, 2025, before U.S. District Judge Nathaniel Gorton.

Federal prosecutors credited the Massachusetts State Police and local police departments for assisting in what they described as a coordinated takedown of a violent, repeat offender.

Assistant U.S. Attorney Lauren Maynard of the Major Crimes Unit is prosecuting the case.