Munster are lacking a little bit of creativity in attack and it's costing them games, according to Shane Byrne.

Johann van Graan’s side fell to their first defeat at Thomond Park in 22 games last night with a 13-6 loss to rivals and Guinness Pro14 champions Leinster.

Trailing 13-3 at the break, Munster, according to former Ireland hooker Byrne, had enough possession to score more and that the late loss of a lineout close to the opposition line was a "sin."

"A draw probably would have been a fair result," Byrne told RTÉ Sport.

"You have to compliment Leinster with their incredible defence at the end but Munster...they were picking and going and making yards and inches, making the ground they needed through hard work, the slog up front.

"But when it went out to the back they’d end up losing it, a pass would go to deck or something wouldn’t go right, they’d end up losing a few yards and that’s the thing that they’ve got to change.

"The pick and go’s are all well and good, it’s great for sucking in defences but when you do that you’ve got to create something else to take advantage of that, to stretch that defence again, even if you don’t get over the line – make them concentrate on a different strike zone, a different area.

"They did an awful lot right.

"To me [to lose that lineout] is a sin. To do that when you have momentum on your side...was an awful shame."

Munster, who sit top of Conference B, next play Ulster in Belfast on Friday (7.35pm), while Conference B leaders Leinster’s next assignment is to host Connacht on Saturday (5.30pm).