Three people were missing aftertheir hot air balloon crashed in the US state of Virginia late Friday, media reportsquoting police said.The pilot and two occupants were travelling over Caroline County when the balloonhit a power line and caught fire.Witnesses told local broadcaster WWBT they had heard the occupants scream "Helpme, I’m going to die".Police said the search for the balloon was still underway.It had been one of three launched during a local festival.