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.
Copyright 2012 KCTV (Meredith Corp.) All rights reserved.
Thursday, May 23 2013 7:30 PM EDT2013-05-23 23:30:51 GMT
The Lafayette County Prosecutor has charged the father of a 10-week-old baby with her violent death.Alex Anthony Gilbert, 24, of Independence was charged with second-degree murder. His daughter died fourMore >
The Lafayette County Prosecutor has charged the father of a 10-week-old baby with her violent death.More >
Thursday, May 23 2013 7:13 PM EDT2013-05-23 23:13:19 GMT
Police are investigating whether a person being shot in the chest is connected to a home invasion robbery.Two men attempted to burst into a home in the 106 block of Greenwood Road when shots were fired.More >
A woman fired shots at three men attempting to break into her home, and one of the suspects was shot in the chest, police said. Her husband described the harrowing ordeal. More >
Thursday, May 23 2013 7:44 PM EDT2013-05-23 23:44:12 GMT
Police are investigating after elementary school kids in Johnson County allegedly had $30,000 stolen from them. Families at Valley Park Elementary, which is located off of West 123rd Street in OverlandMore >
Police are investigating after elementary school kids in Johnson County allegedly had $30,000 stolen from them.More >
Wednesday, May 22 2013 6:04 PM EDT2013-05-22 22:04:40 GMT
MISSOURI CITY, TX (KPRC/CNN) - When a pregnant teacher in Texas collapsed, her coworkers rushed to help. The woman technically died, gave birth, and then was brought back to life. Erica Nigrelli, an EnglishMore >
A pregnant woman's heart stopped, and doctors performed an emergency c-section to rescue the baby and save the woman.More >
Friday, May 24 2013 4:38 AM EDT2013-05-24 08:38:10 GMT
(RNN) - A bridge in Washington has collapsed and at least two cars are in the water, according to KING 5 TV out of Seattle. The bridge is part of Interstate 5. There is no word on injuries. Copyright 2013More >
A photo from the scene showed a man sitting on top of his car, which was partially submerged.More >
Wednesday, May 22 2013 6:13 PM EDT2013-05-22 22:13:31 GMT
Residents of a southern Overland Park neighborhood had feared a vicious killer was on the loose after a jogger was found dead, but his death has been ruled a suicide.Raheel Morani, 24, slashed his ownMore >
Residents of a southern Overland Park neighborhood had feared a vicious killer was on the loose after a jogger was found dead, but his death has been ruled a suicide.More >
Thursday, May 23 2013 8:36 PM EDT2013-05-24 00:36:54 GMT
A two-vehicle wreck caused some major backup on Interstate 70 Thursday evening. The wreck closed I-70 westbound past Interstate 670. Drivers reported seeing traffic backed up for miles. Officials saidMore >
A two-vehicle wreck caused some major backup on Interstate 70 on Thursday evening.More >
Friday, May 24 2013 2:31 AM EDT2013-05-24 06:31:07 GMT
Jodi Arias (Source: CBS 5 News)
It is now in the hands of the 12 jurors to decide if Jodi Arias will live her life behind bars or if she'll be executed. The defense and prosecution gave their closing statement Tuesday afternoon andMore >
The judge has declared a mistrial in the penalty phase of the Jodi Arias trial. The jury announced late Thursday afternoon that they could not reach a unanimous decision on life or death for Arias.More >
Thursday, May 23 2013 7:57 PM EDT2013-05-23 23:57:02 GMT
A massive tornado was carving its way through town. There was no time to hesitate. LaTisha Garcia had to get to her children. And so she raced against the storm. She had 30 miles to cover from her jobMore >
A massive tornado was carving its way through town. There was no time to hesitate. LaTisha Garcia had to get to her children.More >
Thursday, May 23 2013 9:23 PM EDT2013-05-24 01:23:48 GMT
A little boy has suffered serious injuries after a car hit him Thursday evening. The 4-year-old boy was hit while in the area of East 35th Street and Emanuel Cleaver II Blvd. He was taken to Children'sMore >
A little boy has suffered serious injuries after a car hit him Thursday evening.More >