HEMPSTEAD - Nassau County police have arrested two teenagers accused of robbing a Chinese food deliveryman in Hempstead last night. Authorities say Lamel Blaylock and Shakim Sheppard targeted the worker as he was making a delivery on Elm Avenue. They say the teens grabbed cash and food, then fled to Sheppard's home. Police say they found the teens and a loaded gun in Sheppard's bedroom.