Bushwalker missing in NSW state forest

The search for a bushwalker missing in state forest in far north NSW has been suspended until morning.

Police and volunteers spent Wednesday scouring Torrington State Park north of Glen Innes after the 69-year-old man was reported missing on Tuesday when he failed to return to his vehicle.

There are grave concerns for the man's welfare as he has medical conditions and no food or water, police said.

The hunt is expected to resume at 8.30am on Thursday.