WATERBURY, Conn. (WTNH) — A suspect has been charged with murder in connection to the fatal shooting of an 18-year-old in Waterbury, according to authorities.

Joseph Zavala, 18, died after being shot Saturday in Waterbury, according to police.

Police said Joseph Zavala of Waterbury was dropped off at Saint Mary’s Hospital around 7:30 p.m. with a gunshot wound. Police said on Monday that he died from his injuries after being in critical condition.

Duane Mercer, 20, has been charged with murder in the fatal shooting of Zavala, police said in a press conference on Friday.

He was shot near North Main Street and Kingsbury Street, according to police.

Waterbury police believe gang activity is related to the deadly shooting.

Waterbury Chief Fernando Spagnolo said both Mercer and Zavala were affiliated with local gang violence.

Waterbury police said Mercer was arrested on Thursday and taken into police custody.

Mercer was charged with murder, conspiracy to commit murder, illegal discharge of a firearm, reckless endangerment and carrying a pistol without a permit.

Mercer was arraigned on Friday at Waterbury Superior Court. He has a court-set bond of $2 million.

Waterbury police are expecting to make additional arrests in connection to the deadly shooting.

Anyone with information is asked to call the Waterbury Police Department’s detective bureau at (203) 574-6941 or the Crime Stoppers anonymous tip line at (203) 755-1234.