CHICAGO (STMW) – Four men have been killed and at least 20 people were wounded in gun violence on the city’s streets from Friday night to early Sunday.

The fatal shootings include one man who was fatally shot and two others that were wounded by police in two separate incidents this weekend.

Police shot at one man and killed another after they allegedly pointed handguns at officers responding to a Roseland neighborhood block party 9:30 p.m. Friday in the 200 block of West 110th Street, according to police.

The unidentified man in his 20s was pronounced dead at the scene at 11:49 p.m. Friday, according to the medical examiner’s office. The second man who allegedly pointed a gun was found in a nearby yard and arrested without incident, the statement said. The third suspect was arrested at the scene. No police officers were injured and two weapons were recovered, the statement said.

Alex J. Benison, 35, was shot and killed during a robbery about 8:45 p.m. Friday night, in the 12200 block of South Ada Street, two blocks away from his West Pullman neighborhood home on the Far South Side. Benison, of the 12100 block of South Ada Street, was pronounced dead at the scene at 9 p.m., according to the medical examiner’s office.

Brian Cherney, 22, was found dead on a sidewalk in the 4800 block of West George Street in the Northwest Side Belmont Cragin neighborhood at 2:20 a.m. Saturday, according to police and the Cook County Medical Examiner’s office. Cherney, of the 4800 block of West Wolfram Street, suffered a gunshot wound to the chest.

Jerell Butler, 26, was killed and another hurt when a shooter on a bicycle opened fire about 1:10 a.m. Saturday in the 900 block of North Drake Avenue in the West Side Humboldt Park neighborhood. Butler was dead at the scene after he was shot in the head and the chest. The other man, 32, was shot in the upper right arm and taken in “stable” condition to Saints Mary and Elizabeth Medical Center.

In non-fatal shootings, police shot a 17-year-old boy was shot after he allegedly pointed a gun at officers about 9:10 p.m. Saturday in the 7700 block of South Wolcott Avenue in the South Side Englewood neighborhood. He was taken in “stable” condition to Advocate Christ Medical Center in Oak Lawn with a gunshot wound to the buttocks, said Fire Media Affairs Cmdr. Sean Flynn. No officers were injured and a weapon was recovered.

(Source: Sun-Times Media Wire © Chicago Sun-Times 2012. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)