Four municipalities dealt with attempted street takeovers this weekend.

The first takeover occurred just after 1 a.m. Saturday on Pershing Drive in Derby. Police say a large amount of vehicles and people were involved, performing stunts and blocking roads and business exits.

North Haven police responded to a takeover on Saturday night, where 1,500 vehicles from several states led to the shutdown of a busy stretch of Universal Drive and left shoppers stuck in parking lots.

Later that night, police video showed hundreds of people and cars participated in a takeover in the parking lot of Stop & Shop on Bridgeport Avenue in Milford. Video also showed fireworks being shot off and police officers attacked.

One officer was injured and released from the hospital.

"He was surrounded. Hit, punched, had items thrown at him. We're investigating two individuals that proceeded to jump on the hood of the vehicle," says Officer Brianna MacDonald.

Meanwhile in Shelton, 500 vehicles attempted a similar takeover but were turned away by police.

Authorities say the takeover in Milford was the smallest but caused the most damage.

Milford police tell News 12 this instance is different than the street takeover back in July.

"The people surrounding the car, assaulting the officer, we haven't seen behavior like that. The one in July, they were not cooperative with us, but they weren't necessarily trying to damage vehicles or assault officers. We do have some leads that our detective bureau is investigating," says MacDonald.

Experts say the takeovers have become more dangerous.

"We've actually seen these takeovers become more riot-like. They weren't meant to be when they originated in the 1960s. They were meant to be a way to show off muscle cars, and we've now seen it now become something that is a risk to public safety," says Kimberly Przeslowski, a Quinnipiac University criminal justice professor.

Przeslowski tells News 12 the tools police use to investigate takeovers have evolved.

"They use technology that could ultimately pick up, detect certain keywords and risks that are being used across social media outlets. Detectives are able to follow up on these incidents and track those license plates," says Przeslowski.

Milford police say they're working with neighboring departments to find those responsible.