CHICAGO (CBS) — Chicago was focused this weekend on the NATO Summit and the heated clashes between protesters and police in the downtown area, but across the city, seven people were killed and at least 22 more were injured by gunfire.

In the most recent shooting, two men were killed as they ate tacos around 12:40 a.m. Monday on the front steps of a house in the 2200 block of South Leavitt Street. Two other men walked up on foot and asked them about buying marijuana, and one then shot them, police said.

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Alejandro Munoz, 26, of the 2300 block of South Oakley Avenue, was shot in the head and was dead on the scene, authorities said.

Esteban Alvaraz, 27, was shot in the abdomen. He was taken to Mount Sinai Hospital where he later died, according to the Cook County Medical Examiner’s office.

Around 8:20 p.m. Sunday, Joseph Owens, 25, was found shot and killed behind an apartment building in the 7900 block of South Troy Street on the city’s Southwest Side. He had multiple gunshot wounds, and police believe he was shot Saturday.

About 11:55 p.m. Saturday, Dwayne Billingsley, 35, was shot and killed in a gangway in the 10100 block of South Michigan Avenue.

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A couple of hours earlier, Nazia Banks, 12, was walking home along the 8000 block of South Brandon Avenue in the South Chicago neighborhood, when two men walked up and shot him in the head. He was later pronounced dead.

Around 2:30 a.m. Saturday, Melvin Jacobs, 23, was among six who were shot at a birthday party in the 11600 block of South Peoria Street. Jacobs was the only one who succumbed to his wounds, though a 32-year-old was left in critical condition after being shot in the head.

And about 9 p.m. Friday, Alejandro Jamie, 14, was shot in the back in the 2600 block of West 35th Place. He was pronounced dead shortly afterward at Mount Sinai Hospital.

At least 22 others – including the five shot with Jacobs early Saturday — were wounded in shootings across the city over the weekend.

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The Sun-Times Media Wire contributed to this report.