New Bedford Narcotics Detectives continue their crackdown on drug distribution rings in the city.

The latest raids happened Wednesday.

Police arrested 41-year-old Ramone Serrano at his residence at 1541 Purchase Street and seized more than 900 grams of heroin and more than 290 grams of cocaine.

Police say Serrano was out on parole at the time of his arrest and has a lengthy history of drug offenses, including five prior trafficking convictions, and four convictions for possession of drugs with intent to distribute.

Also on Wednesday, police carried out a search warrant at 306 Tinkham Street, seizing five grams of heroin and arresting two men: 37-year-old Miguel Castillo-Aguavivas, and another man who has not yet been positively identified.

Detectives said Castillo-Aguavivas had outstanding warrants for drug offenses dating back to 2013.

Last month, members of the Narcotics Unit broke up three separate fentanyl distribution services and arrested three alleged drug traffickers.

"Drug distribution and trafficking touch the lives of nearly every resident in our community," said Police Chief Joseph Cordeiro. "I commend the work of our detectives in the Narcotics Unit for their relentless push to break up drug distribution activities."