Three Walmarts in eastern Kansas were evacuated early Sunday after bomb threats were telephone in.
This brings the total to at least 11 Walmarts in Kansas and Missouri since Friday afternoon.
A spokesman for the FBI confirmed to KCTV5.com Monday morning that the FBI is assisting local law enforcement agencies in the investigation.
Authorities, including the FBI, are declining to say whether they believe one person is responsible for the bomb threats or whether copycats are involved.
Two Walmarts in Lawrence were evacuated just before 2:30 a.m. Sunday. Lawrence Sgt. Kirk Fultz said one of the stores was at 550 Congressional Drive while the second one was at 3300 Iowa St.
Fultz said the voice in the message stated bombs were in the stores, and that many people would die. Police found nothing suspicious, and customers were allowed to return to the store.
In Leavenworth, the threat was about the Walmart Supercenter located at 5000 10th Avenue. The threat was made about 4 a.m.
According to police, the scene was cleared shortly after arriving.
At least eight Walmart locations across Missouri were evacuated Friday evening after receiving similar threats. Two of those locations are in the Kansas City area. Click here to read previous coverage.
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