Croatia striker Dado Prso scored twice for Rangers in a 3-0 win over third-placed Hibernian which put the Glasgow giants top of the Scottish Premier League table.
Rangers dominated the game and could have scored a hatful of goals if Hibernian goalkeeper Simon Brown had not been in superb form.
Brown saved a penalty by Nacho Novo just before halftime after Novo was fouled. Prso hit the woodwork after scoring his first goal with a header from a corner.
Prso scored his second five minutes after halftime to put the game beyond Hibernian's reach before Belgian striker Thomas Buffel added a third.
Rangers, with 62 points, lead on goal difference from Celtic who play at Inverness Caledonian Thistle tomorrow.
Hearts, in fourth, beat Kilmarnock 3-0 and Aberdeen (fifth) went down 2-1 at Dunfermline Athletic.
This evening, Aberdeen manager Jimmy Calderwood branded Ireland Under-21 star Richie Byrne's defending as amateurish after he allowed Dunfermline substitute Simon Donnelly to score a late winner in the 2-1 defeat at East End Park.
Another Irish underage star, Billy Mehmet, had put the Pars ahead in the 53rd minute before Alexander Diamond's equaliser 20 minutes looked to have secured a share of the points for the Pittodrie side.
But, with seven minutes remaining, slack defending by former Pars' defender Byrne allowed the former Celtic man grab a late winner.
Ex Shamrock Rovers star Byrne was jeered by the home support throughout the game but the Aberdeen manager refused to sympathise with the Irishman.
Calderwood said: "I don't feel sorry for him, it was amateur stuff. I feel more sorry for Jimmy Nicholl and myself. I think he was affected by the crowd big time and he's just been told that. I was disappointed and I spoke to him afterwards."
Byrne remained tight-lipped about Calderwood's criticism but denied the Pars' crowd had played any part in his slip.
He said: "I'm not going to comment on what he (Calderwood) said. The gaffer said a couple of things to me after the game and I'm not going to discuss them outside the dressing room. You can't blame fans for getting the hump, they are the ones who make the game. It is quite enjoyable when they are booing a player."