Cardiff Blues pulled away from London Irish with two second-half tries in their European Challenge Cup clash.
Scrum half Lloyd Williams touched down in the corner just after the hour, after Cory Allen was held up just short of the line.
Substitute hooker Kristian Dacey then crossed the line after relentless pressure from the Blues forwards.
The visitors scored a late penalty try of their own, to make the final score at Cardiff Arms Park 24-14.
The Blues have now won all three of their games in the European Challenge Cup.
The Blues were neck and neck with London Irish at half time in the European Challenge Cup.
Shane Geraghty crossed for Irish after 8 minutes, only for Richard Smith to pull one back for the Blues. New arrival Gareth Anscombe slotted the conversion, but missed a penalty later.
Guinness PRO12 leaders Ospreys made it six wins from six by beating Welsh rivals Cardiff Blues 26-15 in a one-sided clash at the Liberty Stadium.
The match may have finished two tries each, but the Ospreys dominated possession and territory for large periods and could easily have achieved a bonus-point win.
The home side scored a try in each half for Dan Evans and Rhys Webb, with Dan Biggar supplying 16 points with four penalties and two conversions. The Blues rallied at the end with tries for Lloyd Williams and Kristian Dacey.
Adam Jones faced his former region Ospreys for the first time since joining them in August.
In the early stages the Blues struggled to get their hands on the ball and soon found themselves 9-0 behind after 11 minutes through three Biggar penalties.
It did not get any better for the Blues as Warburton found himself yellow-carded for not being 10 metres when Webb attempted a tap penalty.
That offence saw Biggar make it four penalties on the trot.
The Blues did get on the scoreboard on 26 minutes with a finely struck penalty from Rhys Patchell on halfway.
The only thing missing from the Ospreys' confident performance was a try, but that arrived on 29 minutes in the form of full-back Evans went over after another wave of attacks by the home side.
In the dying minutes the Blues finally got some momentum and scored two late consolation tries.
Leinster were made to fight all the way for their second Guinness Pro 12 win at the RDS Arena with a late bonus point try sealing a 37-23 triumph over the Cardiff Blues.
Rhys Ruddock's storming solo try had Leinster leading 13-9 at half-time, with Ian Madigan kicking eight points and Rhys Patchell contributing all 9 for Cardiff.
Converted efforts from Cory Allen and Sam Warburton put the Blues back in the hunt at 27-23, but the defending champions made certain of victory with Madigan's third penalty and Luke McGrath's late try.
Cardiff Blues ran in five tries on their way to a 41-26 victory in their PRO12 opener at Zebre this afternoon.
Rhys Patchell, Lloyd Williams, Dan Fish, Alex Cuthbert and Kristian Dacey all touched down, to earn the Welsh side a bonus point.
Fly half Patchell kicked another 15 points in a superb performance in Italy.
Wales prop Adam Jones has explained his move to the Cardiff Blues in an open letter to Ospreys fans.Read the full story ›
Adam Jones says his move to Cardiff Blues is about "a new challenge".
At this stage in my career I want a new environment and to really push myself.
I've been really impressed by the set-up at Blues and the desire to achieve in the coming years under the leadership of Mark Hammett. It is that ambition and potential for the future that excites me about this move.
Obviously I would like to thank everyone at the Ospreys - from the players and coaches to the wonderful supporters - who have been absolutely fantastic with me. I wish the region every success for the future.
Cardiff Blues have announced the signing of veteran Wales prop Adam Jones from rival region the Ospreys.
Jones, 33, has made 95 appearances for Wales and toured twice with the British & Irish Lions.
Wales captain Sam Warburton has been left in limbo in terms of his club rugby as the dispute between the WRU and regions continues.
Warburton signed a central contract with the WRU over the summer. But as the regions have a policy of not fielding centrally contracted players, he can't be selected for the Cardiff Blues until a new participation agreement has been struck between the regions and the WRU.
The Blues play Exeter in their penultimate pre-season friendly on Friday. Warburton has recovered from the shoulder injury that put him out of action last season, but the Blue have confirmed that they can't pick him.
Until the services agreement has been sorted we unfortunately can't pick Sam and so he won't be involved against Exeter.
I've been told by the region that, at the moment, he is unable to play for us. Until everything is signed and sealed that will be the case. As soon as it is done we will crack on.
The ongoing dispute leaves Warburton in danger of missing the start of the PRO 12 competitive.
The Blues travel to Leicester on 29th August for their final friendly before their Guiness PRO 12 season begins against Zebre on 7th September.
Injured Welsh rugby star Owen Williams took to Twitter this weekend to express his thanks to the many people who have wished him well.
The Wales and Blues centre suffered a significant injury to his cervical vertebrae and spinal cord, while playing in Singapore in June.
The 22-year-old posted a picture from hospital, with his pet dog Riley.
Cardiff Blues have launched a fundraising and awareness campaign to support Williams as he makes his recovery.