"Cocaine, heroin, crack cocaine, marijuana and synthetic marijuana, which is a composite of many different chemicals," said Inspector Joseph Fredericksdorf with the Narcotics Strike Force.
During the weeks-long investigation, officials closely monitored about 40 homes around McPherson Square. In total, 200 people were arrested. Most of the people arrested were buyers, but Fredericksdorf says their main focus is on the dealers in the neighborhood.
"We realize some people are crippled by addiction, but we have a duty to the neighbors to remove the dealer from the block, because nobody wants a drug dealer on their block," he said.
"We look at a gun as a win for someone NOT getting shot," Fredericksdorf said. "These guys are arming themselves with military-style weapons, so that is a constant threat for us, and we have to be vigilant."
Authorities remind the public that they can call in anonymous tips when they see and hear illegal activity.