It was both. They shot down the jet, then shot down the RESCUE helicopter.
BREAKING: Second pilot found dead amid reports rescue helicopter also DOWNED
Russian rescue helicopter 'shot down by Syrian rebels' while searching for pilots
Scroll down at this link for footage of the ‘rebels’ using AMERICAN MADE AND SUPPLIED TOW missiles to shoot the helicopter.
http://news.sky.com/story/1593378/russian-jet-shot-down-by-turkey-live-updates