Munster returned to the top of the United Rugby Championship with a superb six-try win over Scarlets.

The win was marred, however, by an injury to RG Snyman, the South African lock who had recently returned from a long-term knee injury.

The 26-year-old limped off shortly after coming on as a second-half replacement.

The extent of the injury was not immediately known but head coach Johann van Graan told RTÉ Sport after that it "might be significant".

On the pitch a Munster side that contained 11 changes from last week's win over the Stormers simply blew an experienced Scarlets side away.

The hosts started with nine internationals and recalled three Lions into the match-day squad, while Munster had left the majority of their front-liners at home.

Tries from Jack O’Sullivan, Liam Coombes (2), Calvin Nash, Jeremy Loughman and man of the match Chris Cloete did the damage, while Ben Healy was exceptional at out-half.

Van Graan's side wasted no time in the sunshine of Parc y Scarlets in Llanelli with O’Sullivan taking a superb line off a ruck on the 22 to run in unobstructed in the third minute.

Healy converted and added a penalty seven minutes later, while Sam Costelow got the Welsh side on the board with a penalty at the end of the first quarter.

Dominating the breakdown and lively with ball in hand, Munster soon got their second try, Coombes, who scored twice for Garryowen in the AIL last weekend, in support after Nash had broken the line on the wing.

Dwayne Peel’s side then enjoyed their best spell of the game with Johnny McNicholl scoring a breakaway try and Costelow kicking five points to reduce the margin to just four points coming up to half-time.

But Munster weren’t finished there and a powerful burst up the middle by the pack created space for Nash to take advantage of a deliciously weighted Healy pass to dive over in the corner to hand the visitors a 22-13 lead.

Prop Jeremy Loughman barged over for the bonus point three minutes after the resumption and Coombes picked up his second following a superb Jack O’Sullivan break just before the hour mark.

Snyman, who had made two substitute appearances over the last fortnight after returning from a lengthy lay-off came on for Thomas Ahern in the 51st minute but his day was short lived as he was taken off ten minutes later.

Soon after fellow South African Cloete took advantage of a gap in the hapless Scarlets defence, with the try being awarded after a TMO consultation.

Munster are back on the top of the standing on 15 points with a better scoring difference than Ulster ahead of next Saturday’s home game against Connacht.

Scarlets: Johnny McNicholl; Tom Rogers, Jonathan Davies (capt), Scott Williams, Steff Evans; Sam Costelow, Gareth Davies; Rob Evans, Ken Owens, Samson Lee; Lloyd Ashley, Aaron Shingler; Blade Thomson, Dan Davis, Sione Kalamafoni.

Replacements: Ryan Elias, Wyn Jones, Will Griff John, Morgan Jones, Shaun Evans, Kieran Hardy, Dan Jones, Johnny Williams.

Munster: Matt Gallagher; Calvin Nash, Liam Coombes, Dan Goggin, Shane Daly; Ben Healy, Neil Cronin; Jeremy Loughman, Diarmuid Barron, Stephen Archer; Thomas Ahern, Fineen Wycherley; Jack O'Donoghue (capt), Chris Cloete, Jack O'Sullivan.

Replacements: Kevin O'Byrne, Josh Wycherley, John Ryan, RG Snyman, Alex Kendellen, Paddy Patterson, Jack Crowley, Jack Daly.

Referee: Ben Blain (SRU)