ANCHORAGE (KTUU) - UPDATE - 4:25 p.m.:
Authorities are actively working to determine the IP address of the computer that was used to threaten Bear Valley Elementary.
Previously, a message was received on the FBI's national tip line, in which an unknown person reportedly claimed they were going to "shoot up Bear Valley Elementary" before killing themselves. As a result, multiple Bear Valley area schools were put into "stay-put mode," across both Alaska and California.
According to FBI Anchorage Division spokesman Rich VanVeldhuisen, authorities have made contact with the individual who reported the threatening message. VanVeldhuisen confirms that this person lives in the Lower 48.
UPDATE - 12:35 p.m.:
Bear Valley Elementary School in Moreno Valley, California responded to the same threat Thursday. Christopher Weddle, a spokesperson for the Moreno Valley Unified School District said the school had not been put in lockdown, but there was a police officer on hand throughout the day.
Weddle said a separate threat was made against the district a few months ago, but it's not something that happens often.
The Moreno Valley Unified School District has 40 schools and more than 33,000 students.
UPDATE - 11:32 a.m.:
Anchorage Police say Bear Valley Elementary and Goldenview Middle schools were put into "stay-put mode" after a message was received on the FBI's national tip line. An unknown person reportedly posted on social media they were going to "shoot up Bear Valley Elementary" before killing themselves.
Anchorage is one of the states that has a Bear Valley Elementary School.
Goldenview was placed in stay-put mode due to its proximity to Bear Valley.
APD says both schools are still in stay-put, but David Nogg, a principal at Goldenview, says the school is no longer in "stay-put mode."
South Anchorage High School was in "stay-put mode" for about 20 minutes Thursday morning, according to the Anchorage School District.
Catherine Esary, a spokesperson for the district, says the status lasted from 8:50 a.m. to 9:12 a.m., as police tried to identify suspicious cars in the parking lot.
She couldn't say why the cars were deemed suspicious.
Esary said that Anchorage Police would release more information once it was confirmed.
A Channel 2 reporter also saw police on scene at Bear Valley Elementary and Goldenview Middle schools. The district confirmed the schools were also in "stay-put mode", but could not confirm why and referred all calls to Anchorage Police.
Anchorage Police are aware of the situation, and say they can't provide any additional information at this time.
This is a developing story, stay tuned to KTUU.com for more information.
Channel 2's Leroy Polk, Sidney Sullivan and Victoria Taylor contributed to this report.