OIL CITY, Pa. (EYT) — Oil City High School Principal Scott Stahl has confirmed that three students are facing charges for making gun threats just one day after a deadly school shooting in Parkland, Florida.

Stahl told exploreVenango.com that three students made general threats of gun violence on Thursday, February 15.

The threats came one day after a mass shooting at Marjory Stoneman Douglas High School in Parkland, Florida.

Seventeen people were killed and fourteen more were sent to nearby hospitals, making it one of the world’s deadliest school massacres. The suspected perpetrator, Nikolas Jacob Cruz, was arrested shortly afterward and confessed. He faces 17 counts of premeditated murder.

Stahl said the three Oil City High School students — who are all under the age of 18 — were charged.

Stahl also dismissed a rumor circulating that the Oil City High School was on lockdown Wednesday.

In an automated call Wednesday morning to parents, high school Principal Scott Stahl said, “a school safety concern that has come to our attention.”

“Last week, threats of gun violence were reported to the high school. The staff and administration, worked in the conjunction with the Oil City Police Department, to follow our established protocols to address the concerns,” Stahl said in the call.

“I can tell you that all the threats have been investigated. Consequences both at the school, and legally, have been implemented. Our schools are running normally. Thank you and have a good day.”

Stahl didn’t release any specific disciplinary details regarding the trio involved in the threat, but he did say that suspensions or a change in placement are standard punishments for this type of incident.

The students’ names have not been released.