From Casey McNerthney at seattlepi.com:
Medics responded to the Green Lake Community Center Thursday afternoon after a man called 911 and said someone had been stabbed and was badly bleeding.
But fire personnel walked around the building and found nothing, and staff there told authorities they didn’t know of any stabbing.
After circling the Evans Pool building and the basketball court, responders went to the Bathhouse Theater in case the caller had the wrong location.
Attempts to contact the caller were unsuccessful – police said his cell phone was turned off and went to voice mail.
Medics were called off about 10 minutes after the initial call when no victim was found.
Thanks for the tip, Bernie!