UPDATE: Police say the missing 14-year-old has been found safe.
Police in Isanti County have issued an appeal to find a young boy who went missing Tuesday evening.
The sheriff's office says that Brenden Marx walked away from his home on 245th Ave. NW. in Athens Township, with deputies unable to locate him after a search.
Marx has some developmental disabilities and has walked away from home before, police say.
"He usually walks up to a house to ask for help," the sheriff's office added.
He's believed to be wearing shorts and a t-shirt with dark blue/black tennis shoes, and a red baseball cap, and is carrying a backpack.
Anyone who sees him should call 911.