Omaha police were notified about several bomb threats called into multiple CVS pharmacies on Thursday.  

Someone called the pharmacy and demanded cash be placed on a green dot card or the building would be blown up.  

Staff members were aware of the scam from previous attempts and did not cooperate and called 911.  

Police say this scam has happened before in Omaha, and other pharmacies nationwide.  

No devices were found in any of the pharmacies.