Police in Louisville, Kentucky are responding to a call of an “active shooter” at Western High School.

Western, and the nearby Waller-Williams Environmental School, have both been placed on lockdown.

2 Louisville, Ky.,schools on lockdown; school system spokesperson says police on scene -@courierjournal via @breakinghttp://t.co/nLl8vfF0p2 — Joni Kennedy (@joni_kennedy) September 18, 2015

Officials are saying the lockdown was a precaution, as they are trying to confirm the presence of a shooter. There have been no reported injuries yet.

There is a heavy police and firefighter presence at both schools, blocking the nearby roads. The authorities are saying they received a “phoned in threat” at Western High School. No shooter has been found so far.

Western High School has A large police presence Out Front Rockford Lane is shut down pic.twitter.com/C4Luyk8dSW — Neil Johnson (@nilwdrb) September 18, 2015

Parents headed to Western High School are being redirected to the nearby Rockford Lane Baptist Church, where they are waiting for updates from the police.

Western High & Waller-Williams Middle School on lockdown for police investigation. pic.twitter.com/ohoXZDyFoH — Lawrence Smith (@LASmithReports) September 18, 2015

Fire department and police blocking off Rockford Lane outside Western HS. @courierjournalpic.twitter.com/C0Gdr9n15b — Kirsten Clark (@kirstenlmclark) September 18, 2015

Police are telling parents that everything “appears to be OK,” local media report. Every floor of WHS has been searched, no shooter was found.

Jefferson County Sheriff’s Department says a call to 911 made a threat to Western High School and hung up. The caller said "something's going to happen" at the school and a "shooter is in the building," according to Lt. Col. Carl Yates.

Police have swept the entire building, finding no shooter. Another sweep is being conducted before classes can resume.

Srgt. Vittitoe of Shively Police to parents: "Everything is going to be okay. No one appears to be hurt." pic.twitter.com/PSQqfHZmRs — Samantha Chatman (@Sam_ChatmanWDRB) September 18, 2015

"At this point, we think it was just a hoax," Sergeant Vittitoe of the Shively Police Department told the concerned parents.