A Providence man was arrested Saturday after an apparent falling out among roommates led him to fatally shoot a Pawtucket, R.I., boxer and injure another young man, officials said.

Cedric Dalomba, 21, will be charged with first-degree murder and felony assault with additional charges pending, according to a statement on the Pawtucket Police Department’s Facebook page. He is scheduled to be held overnight and arraigned Monday.

Pawtucket police responded to a 911 call for a double shooting at about 1:37 a.m. Saturday, according to a police statement.

Marcelino DeBarros, 20, was inside his residence at 34 Beechwood Ave. in Pawtucket with his roommate, 23-year-old Jalin Braxton, said Detective Sergeant Christopher LeFort, a spokesman for Pawtucket police. They both had gunshot wounds, the statement said.

Both young men were transported to Rhode Island Hospital, according to the statement. Braxton was treated and released. DeBarros was pronounced dead.

During their investigation, police officers from the Pawtucket and Providence departments found Dalomba staying in a house in Providence and arrested him at 5:40 p.m. Saturday without incident, according to the statement. LeFort said he knew both DeBarros and Braxton.

“Cedric was their former roommate,’’ LeFort said in an e-mail to the Globe. “It appears that Cedric and the victims had a [falling-out] which led to him either moving out or being forced to leave.’’

DeBarros was an amateur boxer who had trained at Big Six Boxing Academy for nearly seven years and had won Golden Gloves Tournaments in Massachusetts, according to his former trainer, Roland Estrada.

Estrada, 55, said he’d known DeBarros since the young man was 14 years old. He called DeBarros “a perfect kid.’’

“You hear a lot about people after they die, but he was genuinely a nice kid,’’ Estrada said. “Always smiling. Never said anything bad about anyone. Kind of a wise guy — a funny guy. Always laughing.’’

DeBarros graduated from Tolman High School in Pawtucket in 2015, according to Estrada. The trainer said that when DeBarros wasn’t at the gym — where he was “just about every day’’ — he worked as a group home counselor.

The young boxer was an amateur champion. Estrada said he won Golden Gloves Tournaments once in Lowell and three times in Fall River. Now, Estrada and his boxers are discussing how to memorialize DeBarros.

“Everybody’s sad,’’ Estrada said. “Everybody’s kind of trying to take it in.’’

Rowan Walrath can be reached at rowan.walrath@globe.com. Follow her on Twitter @rowanwalrath.