India, Sept. 30 -- Rialto High School in California is currently under lockdown following an alleged threat, according to a statement posted by the school district on X (formerly Twitter).

"Rialto High School is currently under lockdown. The San Bernardino and Rialto Police Departments are responding to an alleged threat. We will keep you updated. Rialto High School Principal, Dr. Caroline Sweeney, has informed families," the district stated.

The lockdown follows several unconfirmed reports of a possible shooting or active shooter situation on or near campus. Authorities are investigating.

Parents have taken to social media to share their concerns.

One parent wrote on Facebook, "My daughter said cops just busted in her class with guns...