UPDATE 1-Greek conservatives to win snap election, unseat leftists - exit poll

Greek opposition conservatives held a strong lead over ruling leftist Syriza in snap elections on Sunday, a joint exit poll by five private TV stations showed. New Democracy was on course to win 38-42% of the vote, exit polls showed with 80% of the responses counted. New Democracy, led by 51-year-old Kyriakos Mitsotakis, promised austerity-worn Greeks tax relief, stronger growth and a pro-investments stance.