India, Aug. 30 -- A 73-year-old man has been missing for more than three weeks after authorities found his empty RV at a remote Adirondack Mountains campsite in upstate New York, per state troopers. The New York State Police (NYSP) said that Craig K. Streeter, of Mahopac, was last seen August 2 at Stewart's Shop in Indian Lake, Fox News reported.

Police said that it is not unusual for Streeter to go off the grid for short periods. However, he has not been contacted in weeks.

The search began after New York State Forest Rangers discovered Streeter's RV at campsite 36 on Moose River Road in the town of Inlet. There was no sign of recent activity.

Authorities called in additional law enforcement agencies to join the search effort when the...