CHICAGO (WLS) — A 36-year-old man was shot Friday night in River North, Chicago police said.

The man was on the sidewalk in the 400-block of North Wells Street about 7:05 p.m., when he was involved in a physical altercation with an unknown male suspect, police said.

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The suspect pulled out a gun and fired shots at the man, police said. The man was shot in the left arm.

He was taken to Northwestern Memorial Hospital in good condition, CPD said.

No one is in custody. Area Three detectives are investigating.

“It’s just such a shame that stuff like this is happening in River North,” Jacob Raphaeli said. “One guy got into someone’s face. The other guy pulled out a gun, and the gun was fired. And we saw the whole thing happen. The victim ran. The other guy walked away.”

It was not immediately clear what led up to the altercation.

Chicago police officers were seen going inside of the Lou Malnati’s located at 439 N. Wells St.

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“My nieces and nephews are visiting from Texas. We were sitting and eating a peaceful meals. And a few minutes into it, it was a loud pop,” Lou Malnati’s diner Andrew Kim said.

Witnesses said the man shot may have run into the pizzeria to seek out help.

“There was blood, basically, dripping from the entrance point,” said Brendan Treacy, a diner visiting from Boston.

Restaurant staff quickly stepped in to help with a towel, witnesses said.

“Definitely did all that they can do to help him out. I saw they were trying to tie it tight, cut off circulation, keep the arm up so it wasn’t excess bleeding,” Treacy said. “They did a good job, kind of, keeping everything under control, keeping everyone in the restaurant pretty calm.”

The shooting took place in a busy area, full of bars and restaurants on a warm Friday night: the first day of summer.

Crime tape was blocking off the area after the incident.

“I love this city. It’s such a beautiful, amazing city, and I don’t want to see it like this,” Raphaeli said.

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