Peter Horne went over for Glasgow's second try

Glasgow edged Leinster 2-1 on the try-count but indiscipline saw the Warriors lose out heavily on the penalty-count with Ian Madigan adding five penalties to add to his own converted try.

Just 10 minutes had elapsed when Ed Kalman powered over after a great charge from Josh Strauss. Duncan Weir converted to give the the Warriors a 7-0 lead.

Although Madigan reduced the arrears from the tee, Glasgow were in control and Weir restored that seven-point advantage with a penalty of his own.

Leinster's pivot was then on target again with the boot before great work from DTN van der Merwe put Peter Horne over for Glasgow's second try to take them 17-6 ahead.

However, the Warriors were increasingly on the wrong end of referee Nigel Owens' whistle and successive three-pointers from Madigan put Joe Schmidt's team back in contention at half-time.

The opening 20 minutes of the second period was almost exclusively Warriors' pressure, but they couldn't quite find that decisive score.

And they paid for their profligacy when the Irish province's stand-off touched down before he kicked a penalty to secure the win and leave Glasgow knowing this was a game they really should have won.

Gregor Townsend said: "A losing bonus point is not what we came here for and to have led for most of the game it is really disappointing to have only picked up a point. We have a big game on Friday against Munster and we need to pick ourselves up for that.

"We have to learn from defeats and learn from victories. I don't think the break helped our fluency in attack. I thought Josh Strauss was outstanding carrying the ball and Niko (Matawalu) was his usual self, trying to find holes.

"I thought Ian Madigan was outstanding for Leinster tonight, he's an excellent runner, a very good goal kicker and he's young as well.

"There are a lot of positives but we can play much better and we have done. We'll have to be at our best to beat Munster on Friday."

Fly-half Duncan Weir added: "We're all really disappointed after the result but there are lots of positives to take from the game and we have to pick ourselves up for Munster.

"It is frustrating to have led for most of the match and to lose it at the end but there is not much between the top three teams in the league and we've still got it all to play for."