BELLINGHAM, Wash. -- A massive search is under way for a missing high school teacher and track coach.

Jeremy Scully, 38, is a substitute teacher and track coach at Ferndale High School and has been missing since Thursday.

Police said he left his home in Bellingham to visit a friend in Alger just south of the city, but he never showed up.

His car was found Saturday night on Lake Samish just south of Bellingham. According to police, it was unlocked and the key was still in the ignition.

Police have used K-9s, helicopters, and boats to search for Scully, but police said there are no leads.

Search dogs were unable to pick up a scent leading away from Scully's car. Authorities also said teams scoring the shore around the lake and in boats were unable to locate any useful clues.

Friends and family members said his disappearance is alarming and they're concerned for his safety.

"We've known Jeremy for a long time and Jeremy is very dependable. When he says he's going to show somewhere, he's going to show up, so it was out of character for him not to show up for practice on Thursday and Friday," said Vic Randall, the athletic directior at Ferndale High School.