The disappearance of an Edmonton man near the Mill Creek Ravine early Monday morning has been called suspicious by police.

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Alex Thomas-Haug was last seen early Monday morning. (Facebook )

Alex Thomas-Haug, 24, was last seen around 4 a.m Monday when he was dropped off at his home near 95th Street and 73rd Avenue.

Police say he left his house keys at a friend's home on the other side of the ravine and set out on foot to pick them up. He hasn't been heard from since.

While police say there is no evidence of foul play, it's out of character for Thomas-Haug not to make contact with his family or friends. There has also been no activity on his phone, bank and social media accounts.

Volunteers, search dogs, and the police helicopter searched the Mill Creek Ravine and adjacent neighbourhoods on Wednesday night without success.

Family and friends have been trying to get word out about his disappearance via Facebook and Twitter.