TACOMA, Wash. -- Several antique motorcycles that were stolen after a motorcycle show in Tacoma have been found.

Police located four of the five stolen motorcycles and their trailer in Seattle early Wednesday morning.

Related: Bikers stranded after antique motorcycles stolen in Tacoma

The owners of the antique motorcycles were participants in the Motorcycle Cannonball show, which made its last stop at the LeMay America's Car Museum in Tacoma over the weekend. After the show, the owners were planning to return home to Texas when they discovered their Ford pickup truck and the trailer that had five of the bikes were missing from their Tacoma hotel parking lot Monday night.

Among the items that were stolen were Harley Davidsons built in 1919, 1926, 1928, and 1931; four of them were used in the Motorcycle Cannonball event.

The owners notified police, who alerted the public about the stolen motorcycles.

Early Wednesday morning, a worker in Seattle's SODO district noticed the trailer parked in an alley near the Old Rainier Brewery. He looked inside the window of the trailer and recognized the bikes and the Motorcycle Cannonball logo on the trailer from Facebook posts about the theft.

Police recovered four of the five antique motorcycles, but the fifth bike - a 1928 Harley Davidson JD - was not. Police say they also found tubs of bike parts, tools and engines at the scene.

Police later found the Ford pickup truck in unincorporated King County in Auburn Wednesday morning.

The bike owners, who are from Texas and Mississippi, arrived at the scene later Wednesday and appeared happy about the developments.

Watch the full report by KING 5's Glenn Farley tonight on KING 5 News at 4pm and 5pm.