Robbie Keane kept up his impressive scoring rate for Celtic as his second-half penalty helped the Parkhead men to a comfortable 3-0 victory over St Johnstone.
Teenage stopper Josh Thompson's first goal for the Hoops gave Tony Mowbray's side a half-time advantage before Saints keeper Graeme Smith conceded a penalty in the 67th minute for fouling Marc-Antoine Fortune.
The Republic of Ireland star, who was always a threat, slammed in the spot-kick to take his tally to nine in nine games since arriving from Tottenham in January.
Substitute Georgios Samaras, on for Fortune, completed the scoring with three minutes remaining as the Parkhead men moved 10 points behind SPL leaders Rangers, although they have played a game more.
Aberdeen equalled the worst run of results in the club's history with a spirited 2-2 draw with Dundee United. The Dons have now gone 11 games without a win, having only twice previously gone on such a dire run back in 1917 and 1927.
But the Dons can take some solace from this performance as they came from two goals down to earn a point. A Jon Daly double had given Dundee United an early lead but the Dons fought back with a Zander Diamond header and a Michael Paton penalty in first-half stoppage time.
Some stubborn defending in the second half meant both sides had to be happy to take a point in an entertaining match.
Andrew Driver made a goalscoring return as Hearts sealed a 2-1 Edinburgh derby victory over Hibernian with two goals in three first-half minutes. Driver lashed home the 24th-minute opener on his first appearance for more than six weeks, after a knee injury, and Gary Glen soon turned home the second.
Hearts should have put the clash far beyond Hibs but Derek Riordan's 79th-minute goal set up an interesting finale. The hosts held on without serious danger though as manager Jim Jefferies enjoyed a winning return to the fixture in his second spell as Hearts boss.
Winger Ryan Flynn earned Falkirk a crucial point in their battle to avoid relegation as the Bairns came from behind to draw a see-saw encounter 2-2 with Hamilton.
The visitors earned themselves the advantage at half-time thanks to Scott Arfield's 26th-minute strike. But Accies came roaring back after the break with two goals in eight minutes that looked set to send them nine points clear of their opponents at the foot of the SPL.