76-year-old Seattle man killed when he falls off motorcycle on I-5, struck by tractor-trailer

TACOMA -- A 76-year-old Seattle man was killed Monday when he fell off of his motorcycle while driving northbound on Interstate 5 near Joint Base Lewis-McChord and was struck by a semi in the next lane, the Washington State Patrol said.

The victim was identified as Gary E. Blaine.

The driver of the truck was no injured.

The cause of the crash is under investigation, the State Patrol said.