Law enforcement officers in Georgia responded on Wednesday to a shooting at a high school and there were reports at least two people had been killed.

In addition to the two killed, four people were injured in the shooting at Apalachee High School in Winder, MSNBC reported, citing unnamed law enforcement officers briefed on the incident.

One suspect was in custody, the Barrow County Sheriff’s Office said in a statement.

The incident appeared to be under control and students were being released at midday, a Barrow County Schools spokesperson said.

Live aerial TV images showed several ambulances outside of the high school.

CNN said it witnessed a patient being loaded into a medical helicopter that had landed at the school.

“At approximately 10:23am, officers from multiple law enforcement agencies and Fire/EMS personnel were dispatched to the high school in reference to a reported active shooting,” the Sheriff’s Office said.

The FBI field office in Atlanta dispatched agents to the high school to support local law enforcement, said Jenna Sellitto, a spokeswoman for the office.

The US has seen hundreds of shootings inside schools and colleges in the past two decades, with the deadliest resulting in over 30 deaths at Virginia Tech in 2007. The carnage has sparked pitched debate over the US gun laws and the US Constitution’s Second Amendment, which enshrines the right “to keep and bear arms.”