WATERVILLE — Police arrested six people last week on drug trafficking charges after executing five separate search warrants.

Waterville police Chief William Bonney said in a news release Tuesday the arrests came after a monthslong investigation into drug dealing in the city by Patrol Investigator Jake Whitley and Detective Duane Cloutier.

Waterville police and Somerset County sheriff’s deputies simultaneously executed four search warrants at 17 and 19 College Ave. on May 1, finding about 236 grams of cocaine and cocaine base, 14.5 grams of fentanyl, 88 grams of methamphetamine and a handgun.

Police arrested Kevin Soto, 33; Bradly Tucker, 23; Tabitha Soucy, 29; and Corey Leak, 40, all residents of 17 and 19 College Ave., on three counts of aggravated trafficking of scheduled drugs and criminal conspiracy. Soto was also charged with violating conditions of release, and Leak was also charged with illegal possession of a firearm.

The following day, police executed another search warrant based on Whitley and Cloutier’s investigation, charging two more people on aggravated drug trafficking and criminal conspiracy charges.

Kathleen Bruns, 62, of Waterville, and Ernan Serrano, 24, of New York City, were arrested after police found 102 grams of cocaine base in Bruns’ Butler Court residence.

In Maine, aggravated drug trafficking is a Class A offense, the most serious class of crimes. State law requires a minimum imprisonment of four years if convicted.