A United flight was grounded after a passenger found a bomb threat note in the bathroom: reports

• A United Airlines flight was grounded for several hours in Vermont on Sunday.
• A local NBC affiliate obtained audio of the plane's pilot discussing an apparent bomb threat.
• Several law enforcement agencies responded to the incident and found nothing suspicious. 

A United Airlines flight was grounded for more than two hours in Burlington, Vermont, on Sunday after a passenger discovered a bomb threat in the plane's bathroom, according to authorities and reports.