Leinster have moved up to second in the URC table after a domination of the Ospreys at the RDS.
The Blues scored 9 tries on their way to a 61-14 victory in Dublin.
Munster picked up their first interpro win of the season as they hammered Connacht 47-12.
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And Ulster are up to 6th in the table after a 31-20 win away at the Scarlets.