EDINBURGH: Ireland ran in three tries to set up a 21-18 victory over Scotland in their Six Nations clash at Murrayfield Sunday. The result left the Scots still without a point from three games. Ireland joined Wales and France on four points, two behind leader England. Ireland led 21-9 midway through the second half when they looked capable of stretching their advantage. But a lack of discipline enabled Scotland to close the gap to three points, largely through the boot of Chris Paterson. Scotland coach Andy Robinson was bitterly disappointed with referee Nigel Owens, criticizing the Welsh official over his failure to sin-bin any Irish players, despite the fact they gave away 13 penalties against Scotland's four. Scotland prop Allan Jacobsen was the only player sin-binned and Robinson said: “I thought it was a major turning point of the game when we were about to get on top of the Irish.” Ireland coach Declan Kidney said: “I have no intention of getting into a slanging match about the referee. It's a very difficult job. I thought the 31 people on the pitch put in a decent effort and it is important to work to that. “It was edge of the seat stuff at the end.”