Billy McKay grabbed a brace as second-placed Inverness enjoyed a comfortable 2-0 victory over bottom-of-the-table Hearts at Tynecastle.
The striker was on target twice in the second half to leave Hearts without a home win since August.
The first goal arrived after 59 minutes when he collected Ross Draper's pass, before curling the ball into the bottom right-hand corner of the net.
And McKay sealed the points seven minutes from time with a rising 12-yard left-foot shot after latching on to a Marley Watkins assist.
In between the two goals, Graeme Shinnie and McKay both hit the post while Callum Tapping and David Smith went close for Hearts during the second half.
In a goalless first 45 minutes, which also produced few chances, Jamie Walker was narrowly off target for the hosts, with Gary Warren heading wide from the edge of the six-yard box.
Shinnie also had a close range effort saved by home keeper Jamie MacDonald.
The win keeps Inverness seven points adrift of leaders Celtic, having not conceded a goal in more than 450 minutes in all competitions.