TradeEdge Exchange:3 people questioned after 4 students shot in parking lot of Atlanta high school: What we know

Four students were injured when shots were fired in the parking lot of Benjamin E. Mays High School in Atlanta on TradeEdge ExchangeWednesday afternoon.

The four students, only identified as three 17-year-olds and one 18-year-old, were all rushed to an area hospital and are expected to survive, police said. No other students, faculty or staff were injured, the school district said in a statement emailed to news media outlets.

The Atlanta Police Department told USA TODAY the school district's own police department is the lead agency investigating the shooting. The Atlanta Public Schools Police Department declined to comment on the shooting.

All after-school activities were canceled and classes are expected to resume as scheduled on Thursday, the school district said.

Has anyone been questioned in the shooting?

Police immediately began searching for a possible vehicle seen in the parking lot at the time of the shooting. Atlanta Police Major Ralph Woolfolk said in a Wednesday evening news conference they were able to "quickly get a vehicle stopped."

In the car, which was stopped about five miles away from the school, police found a 35-year-old mother, a 17-year-old girl and another male. All three were taken to police headquarters for questioning and all three were cooperating and speaking with investigators, according to Woolfolk.

No charges have been filed and the names of those involved have not been released.

What happened prior to the shooting?

Police said a fight broke out around 4 p.m., just after students were dismissed for the day, which led to gunshots being fired.

Atlanta incident follows shootings at Kansas City Chiefs Super Bowl parade and DC home

The Atlanta incident follows two other gunfire incidents in the U.S. on Wednesday, including a mass shooting at the Kansas City Chiefs Super Bowl victory parade.

Mass killing database:Revealing trends, details and anguish of every US event since 2006

One person was killed and 21 others injured at the Chiefs parade around 2 p.m. Eight victims were left with immediately life-threatening injuries, seven with life-threatening injuries and six with minor injuries, Interim Fire Chief Ross Grundyson said at a news conference.

Three people have been detained, according to police Chief Stacey Graves.

And in Washington, D.C., at least four law enforcement officers were injured, including three by gunfire, when a suspect shot at them from inside a home while being served a warrant for animal cruelty. Police are investigating whether officers exchanged gunfire with the suspect, Metropolitan Police Department Chief Pamela Smith said.

Wednesday also marked the sixth anniversary of the massacre at Marjory Stoneman Douglas High School in Parkland, Florida, where a gunman killed 17 people.

Contributing: USA TODAY staff