The Nova Scotia Health Authority is asking for help to find a patient missing from a Halifax hospital since Friday afternoon.

Jason Christian Walker, 43, was last seen around 3:20 p.m., health officials said in a release. They did not say from which hospital Walker left.

"Concern for his wellbeing increases the longer he is away from care," the health authority said.

He is described as a white man about five foot six inches and 59 kg. He has short brown hair and is unshaven, the health authority said.

Walker was last seen wearing jeans, a black and white bandana on his head and black zippered jacket. He was carrying a dark backpack.

Anyone with information is asked to call police.