The Federal Aviation Administration issued a ground stop for Seattle-Tacoma International Airport on Saturday afternoon because of a security threat on a plane bound for Walla Walla.

One suspect has been arrested after allegedly making a threat to a flight attendant while onboard a flight at Seattle-Tacoma International Airport, according to airport officials.

A passenger aboard Alaska Airlines Flight 2123 allegedly made a bomb threat during taxi operations at Seattle-Tacoma International Airport (Sea Tac) on Saturday afternoon, prompting a major security response that temporarily shut down two runways,