Three people were killed and at least five others were injured after a gunman opened fire at a busy In-N-Out Burger in Twin Falls, Idaho, authorities confirmed Sunday as investigators continued working to determine what prompted the attack. At a news conference Saturday evening, Twin Falls Police Chief Matthew Hicks said a motive for the shooting remains under investigation, noting that the suspected shooter is also dead and police believe there is no longer any threat to the community. Authorities said two of the injured have since been released from the hospital, while several others remain hospitalized in stable or critical condition. The Twin Falls location had opened only days earlier as part of In-N-Out Burger’s continued expansion into Idaho. The FBI is asking for anyone with audio, still images or video footage of the incident to submit them at the link HERE.