Munster head coach Clayton McMillan said "the powers that be" will decide on the outcome of an allegation of serious foul play, after his side's 24-18 defeat to Leinster at Aviva Stadium.

Munster's injury-hit squad felt the full force of Leinster's internationals in the second half of their interpro, as McMillan's side saw their 13-0 lead wiped out by four Leinster tries.

There was a major flashpoint late in the first half, when Munster's Gavin Coombes alleged he had been grabbed in the groin by an unnamed Leinster player at a ruck.

Referee Andrew Brace stopped play during the 39th minute and spent some time speaking to his TMO, who searched for footage of the alleged incident to no avail.

While the officials weren't able to identify the incident during the game, it may still be referred to the citing commissioner.

"It's one of those things that we leave in the hands of the powers that be," Munster head coach McMillan said.

"All I know is that I back our players 100% that if they make an allegation like that.

"They wouldn't do it lightly, and that's not the sort of person Gavin is, so we'll see where that goes."

Leo Cullen was also asked about the alleged incident afterwards.

"I can't see anything there, from what I can see. Obviously, if that is the accusation... but I'm not seeing anything on first view.

"So I don't know. It looked like he [Coombes] had changed his mind halfway through that accusation as well. So I don't know."

The Leinster head coach was asked to clarify what he meant when he said Coombes had "changed his mind".

"Well, that's the way it sounded, once the scrum was packing down.

"But I don't know. Obviously, once that accusation is made, it becomes a serious matter for the citing commissioner. So my comment is not going to help in any way here.

"But from what I've seen, I can't see anything."

Overall, the Leinster head coach was delighted with how his side rallied back to secure a bonus-point win.

Having suffered a 31-14 hammering against Munster this time last year at Croke Park, Cullen admitted it was looking ominous for his side when they fell 13-0 down inside the first 25 minutes.

"Munster, I thought, were good in the contact area, probably a little bit better than us in the first half, both sides of the ball and obviously they went into a 13-0 lead," he added.

"I was like, 'Oh, is this going to be a bit like it was last year in Croke Park?'

"But I thought the players showed good composure to come back and get try. We started getting a little bit of an ascendency, but then we would give away a turnover.

"There was a couple of times we were just a little bit off, gave away turnovers, and that gives Munster life. But the message really at halftime was 'just stick to it' and make sure they enjoy themselves. And keep pounding away.

"The composure is good, the players stick to it, which is big.

"This time last year, we were poor when we got ourselves in that position. We made life more difficult for ourselves, we weren't clinical, but so much more clinical in the second half [today].

"But Munster brought a huge amount to the contest, didn't they? We had to find a way out there today in difficult conditions. So, yeah, pleased to get a win, bonus point."

Jamie Osborne's bonus-point try looked like it would ensure Munster would be leaving the Aviva empty-handed, but a late score for Ben O'Connor did ensure a losing bonus-point for the province.

And while it was some consolation for Munster, their head coach was still left to wonder what if.

"Disappointed to lose, we didn't come here to lose and we don't take any satisfaction out of being gallant losers," McMillan said.

"To walk away with a bonus-point is nice because you look at the table and it's pretty congested, but it was genuine disappointment in the changing shed because we felt like we had enough opportunities and we didn't nail them all."