A Boston man was arrested Friday morning on charges of trafficking and distributing fentanyl following an investigation by a regional task force, officials said.

The man, Yasil Delossantos, 27, was also charged with possession of cocaine, Massachusetts State Police said in a statement. Delossantos was arrested in Lawrence after surveillance officers observed him take a taxi to the site of a pre-arranged drug transaction.

According to officials, state police troopers, along with an FBI agent assigned to the task force, recovered about 60 grams of fentanyl that Delossantos distributed to two customers during the observed transaction.