WILMINGTON -- Police arrested a 33-year-old Lawrence man Tuesday night for allegedly dealing heroin, according to the Wilmington Police Department.

Omar Carrasquillo was expected to be arraigned in Woburn District Court on Wednesday morning.

Wilmington police and members of the Southern Middlesex Regional Task Force launched an investigation into heroin distribution in the area. Officers on Tuesday recovered more than $1,300 in cash and about 71 grams of heroin that were individually packaged for sale, police said.

The arrest comes less than a week after heroin charges were brought in Chelmsford, where a resident who police say brazenly sold heroin to buyers inside Walmart, and a father-and-son team they say were distributing heroin from their Bartlett Street home, were arrested by Chelmsford police detectives in separate busts in the past week.

Matthew Waddell, 22, of 141 North Road, was arrested in front of the Walmart store at 66 Parkhurst Road and charged with trafficking in heroin .

Then, last Wednesday at 9:15 p.m., Ronald Mercer, 49, and Matthew Mercer, 23, were arrested at their residence at 4 Bartlett St., by Chelmsford officers executing a search warrant. The father and son were each charged with possession of heroin with intent to distribute. Ronald Mercer was additionally charged with possession of cocaine.

The Wilmington heroin arrest also comes soon after a Chelmsford woman died in Dracut from an apparent heroin overdose. Brittany Chiasson was reported missing to Chelmsford police by her parents after she did not return home. She was found Friday at 3 p.m., in her car in a parking lot off Bridge Street, and officials believe she died of a heroin overdose, according to Dracut Deputy Police Chief David Chartrand.

Chartrand said police departments in Greater Lowell and Greater Lawrence are seeing an "extremely strong and powerful heroin on the street now."

"There's been a high spike in overdoses," he added.

Follow Rick Sobey on Twitter and Tout @rsobeyLSun.