CHICAGO (CBS) — Police wounded three people in two separate shootings overnight.

In the first incident, police shot two men during a traffic stop, after the suspects allegedly rammed a squad car and struck an officer with the vehicle. Four suspects were arrested.

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The shooting happened about 9:30 p.m. in the 4300 block of West Roosevelt Road, according to a police News Affairs statement.

Mobile Strike Force officers were on a targeted mission in the area, said to be well-known for gang conflict and drug activity, when they saw a vehicle matching the description of a vehicle believed to be transporting narcotics and weapons, the statement said.

After officers curbed the vehicle, one of two men inside allegedly put it in reverse and struck a squad car, then accelerated forward and struck an officer, according to the statement.

One suspect then allegedly pointed a handgun at the officers, one of whom fired and struck both men, the statement said.

Fire Media Affairs spokesman Quention Curtis said two people were taken from that location in critical condition to Mount Sinai Hospital.

Two officers were taken to an area hospital with non-life threatening injuries and were expected to be treated and released, the statement said. Police recovered a weapon at the scene.

About five minutes after the Roosevelt Road incident, police shot a male suspect near 42nd Street and Calumet Avenue in an unrelated incident, police said.

At about 9:40 pm, Wentworth District Tactical officers were on patrol in the 4200 block of South Calumet Avenue, an area known for gang and narcotics activity, according to a statement from police News Affairs.

Officers identified themselves as they approached two males to conduct a field interview, according to the statement.

Both males immediately fled on foot and as an officer entered the alley in pursuit of one of the male subjects, the suspect pointed a weapon at the officer and an officer discharged his weapon, striking the suspect, according to the statement.

Independent Police Review Authority spokesman Curtis Tarver said one person was taken in good condition to Provident Hospital of Cook County. No officers were hurt.

A weapon was recovered on the scene.

Detectives and the Independent Police Review Authority are investigating the incidents.

The Sun-Times Media Wire contributed to this report.

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