ST. LOUIS COUNTY – A teen was shot by police overnight, not far from the unrest that unfolded for the third night in Ferguson.

The shooting happened around 1 a.m. Wednesday at Chambers Road and Sheffingdell Court in unincorporated St. Louis County.

St. Louis County police say they responded to a report about four masked men carrying shotguns in the area. The caller said the suspects had fired shots.

When police arrived at the scene they saw the men running. One officer "came into contact" with a suspect, who turned and pointed a handgun at the officer.

A police officer fired at least once at the 19-year-old suspect, wounding him. He was taken to an area hospital in critical condition. His name has not been released.

The officer is on paid administrative leave, which is standard procedure while the shooting is investigated.

Police say the suspect's handgun was recovered at the scene.

The shooting happened about two blocks from St. Mark Family Church, where the Rev. Al Sharpton held a gathering Tuesday night, uniting the community, which is outraged over 18-year-old Michael Brown's shooting death Saturday afternoon.

Witnesses tell NewsChannel 5 they heard gunfire and saw a guy on the ground restrained by officers. One of the witnesses says they saw several people running from the scene.

A mile away and an hour earlier, a woman was shot in the head while walking outside.

Police say the shooting is not related to recent civil unrest in the area. About a mile away, protests erupted for the third night in a row in Ferguson. Tuesday night's protests began peacefully but ended with police once again firing tear gas into the crowd. Police said they were responding to protesters who had thrown bottles at officers, according to CNN.

Authorities on Tuesday delayed revealing the identity of the police officer who fatally shot an unarmed teen three days ago, citing threats against the officer on social media.

"If we come out and say, 'it was this officer,' then he immediately becomes a target," Ferguson Police Chief Thomas Jackson said. "We're taking the threats seriously."

Jackson, who had said he would reveal the officer's name Tuesday, said there is now no timetable.

Tuesday evening he said the officer has been on the force for about six years and had come across 18-year-old Michael Brown Jr. and a friend walking in the street. The youths were black and witnesses said the officer was white.

Jackson said all but three of the police department's 53 officers are white.

Police have said that after the officer asked the teens to move, a scuffle occurred. Witnesses say Brown had raised his hands to surrender when the shots were fired. Police have not confirmed that information.

A second witness has told the St. Louis NAACP that Brown did not struggle with the officer inside his patrol car, where the fatal shots were fired. The unidentified person will be interviewed by FBI.

Contributing: Yamiche Alcindor