The Brooklyn district attorney’s office said Thursday that Operation Crown Strike in Brooklyn has ended with the arrest of 15 people allegedly involved in a drug ring.

The D.A. and NYPD say they found several gangs dealing drugs in different areas of Crown Heights.

Officers made the arrests after executing several search warrants last week.

Video, shot by police, shows an alleged dealer scooping cocaine to be packaged.

“The case was particularly difficult because the individuals were enormously sophisticated in their operation – they used counter-surveillance techniques,” said Suzanne Corhan, chief of the district attorney’s Major Narcotics Investigations Bureau. “They used methods to avoid traditional law enforcement detection. In fact, they had crude booby traps in some of the locations.”