A Gary Hooper brace after the break helped Celtic romp to a 4-0 victory over Ross County in their clash at Parkhead.
The home side dominated the first half with Staggies goalkeeper Mark Brown forced into several saves, although former Celtic man Rocco Quinn and Alex Cooper both missed great opportunities for the visitors.
However, when Celtic skipper Brown struck a minute after the interval the Highlanders' resistance was broken, and Hooper helped himself to two classic poacher's goals before substitute James Forrest capped his return to action after being out since October with a hamstring injury by grabbing the fourth.
Billy McKay continued his goalscoring streak with a double against Dundee to send Inverness back to second place in the Scottish Premier League thanks to a 4-1 victory.
McKay netted the opener from the penalty spot and took advantage of some slack play from the visitors to put Caley Thistle 3-1 up just after the break and take his tally for the season to 18 goals.
The former Northampton striker has now netted in seven consecutive matches and has seven goals in his last three games, topping the SPL scoring charts with 15 league strikes.
A long-range effort from Owain Tudur Jones and a solo strike from Andrew Shinnie also helped move Caley Thistle above Motherwell and take the club beyond the half-century mark in goals at the halfway point of their season.
Niall McGinn scored twice as Aberdeen beat St Johnstone 2-0 in difficult conditions at Pittodrie.
The Dons were profligate in the first half, with McGinn twice denied by Alan Mannus, before the Northern Irishman scored from a free-kick after 63 minutes.
McGinn's 11th of the season followed after 81 minutes as Aberdeen defied incessant horizontal rain to end a three-match winless run in the league and climb to fourth, above Saints, who are without a win in four.
Information from the Press Association was used in this report