The Saskatoon Police Service is asking the public for help with locating 41-year-old William McKay (pictured).

The Saskatoon man was last seen on Sunday between Noon and 1:30 p.m. in the 100 block of Avenue O South.

Family members are worried because he may be in a vulnerable state and have not heard from him since then.

Anyone with any information with regards to the whereabouts of William McKay is asked to contact the S-P-S or Crime Stoppers.