Blown engine??

last night my friend was driving his truck. He went about 50 miles and them noticed light smoke coming from under the hood. when he tried to accelerate it was kind of sluggish. Pulled over and checked the oil. it didnt have any. Filled it up with oil and drove fine for bout 10 minutes when he said it died and all the water was coming out from somewhere. he couldnt see from exactly where but said somewhere from the back of the engine. sound like he blew it?
Author: sgp7679