All passengers aboard a Delta Airlines plane have been screened by the FBI and allowed to continue on their way after a more than four-hour delay.

Delta Flight 1500, with 151 passengers, was forced to land in a remote corner of Denver International Airport at about 4:40 p.m. because of a threatening note.

DIA announced on Twitter at 9 p.m. that all the passengers had been released to pick up their luggage.

Aaron Baratz, a passenger, told The Denver Post via Twitter that the passengers were taken from the plane by bus. They were not allowed to open overhead compartments and retrieve any bags.

Authorities, including K-9 units, searched and secured the plane.

Other flights are being delayed because of the incident, passengers were reporting over social media.

DIA officials said they were not aware of any delays and said they had been in contact with the airline.

This story will be updated as more information becomes available.

Ryan Parker: 303-954-2409, rparker@denverpost.com or twitter.com/ryanparkerdp