By Tiffany Williams –

State Police with the DEA and Fitchburg Police on Tuesday arrested Rosemary Delossantos, 29, of Fitchburg.

Delossantos was arrested in a parking lot on Whalon Street and then taken to a Depot Street apartment where police executed a search warrant and seized more than 300 grams of heroin/fentanyl.

Delossantos has been charged with Trafficking in Fentanyl (3 counts); Trafficking in Heroin/Morphine/Opium (2 counts); Possession of Cocaine with Intent to Distribute; and Possession of Oxycontin with Intent to Distribute.