(Portland, OR) -- Portland police are looking for a 79-year-old man who's reported to be missing. Authorities say Andrew Griener was last seen leaving his home on Southeast 106th Avenue near Burnside around noon Thursday, with assistance from a walker and wearing a sling on his right arm. Officials say it's possible he was trying to get to a Rite Aid pharmacy a few blocks away and would have used TriMet to get there. Griener is described as white, five-feet-nine, 182 pounds, last seen wearing a yellow t-shirt, white pants, and white sneakers. Anyone who sees him is asked to call 911.