By Matt Petrillo

PHILADELPHIA (CBS) — A Philadelphia police officer opened fire on two men who they say were armed and firing gunshots. Police say those gunmen were wounded by an officer during an apparent late-night shootout that’s now left the community rattled.

“It was pop, pop, pop. That’s all I heard,” one neighbor said.

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“It’s scary, it’s scary. This is stuff that doesn’t normally happen on this block,” said another.

Neighbors in West Mount Airy are still on edge after hearing the booms of an apparent gun battle between officers and two suspects.

“I heard a lot of gunshots, a whole bunch of gunshots,” a neighbor said.

Police say officers were initially responding to a 911 call around 10:15 p.m. Monday about gunshots heard in the area of Glen Echo Road, by Lincoln Drive. As officers began interviewing the 911 caller, investigators say police saw two armed men walking down the street.

“Walking past their police cars after hearing gunshots, they saw two males, one holding a semi-automatic rifle, and one holding a semi-automatic handgun firing shots,” Philadelphia Police Sgt. Eric Gripp said.

That’s when one of the officers started firing back, hitting both suspects.

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An 18-year-old man was shot in the leg by officers and a 23-year-old man is recovering from a graze wound to the face.

“This is very early on in this investigation. We’re not entirely sure what was the genesis of all this,” Gripp said.

But police say they recovered two weapons. One of them a semi-automatic handgun, the other a semi-automatic rifle.

Officers point out the size of these bullets can do a lot of damage to the human body.

“Right now, we’re very fortunate that police officers weren’t injured,” Gripp said.

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Both of the suspects are in stable condition. They now face weapons charges.