EPCR have confirmed that all this weekend's Champions Cup and Challenge Cup matches to be held in France have been postponed after Friday's attacks in Paris.
The games in the Champions Cup include Oyonnax v Ulster, Racing 92 v Glasgow, Bordeaux-Bègles v Clermont and Toulon v Bath.
Pau's game with Castres in the Challenge Cup has also been postponed.
Our thoughts are with the people of Paris at this tragic time.
A statement from EPCR read: "Due to the tragic events last night in Paris and the current period of national mourning in France, EPCR and the Ligue Nationale de Rugby (LNR) have decided to postpone this weekend's European Rugby Champions Cup and Challenge Cup matches scheduled to be played in France.
"Therefore, today's games in the Champions Cup between Oyonnax and Ulster Rugby, and Racing 92 and Glasgow Warriors, as well as this evening's Challenge Cup fixture between Pau and Castres Olympique have been postponed.
"Tomorrow's Champions Cup matches between Bordeaux-Bègles and ASM Clermont Auvergne, and RC Toulon and Bath Rugby have also been postponed.
"The matches will be rescheduled for later dates.
"EPCR extends its sincerest sympathies to everyone affected by the Paris attacks and as a mark of respect, all clubs competing in this weekend's remaining Champions Cup and Challenge Cup fixtures in other territories have been asked to observe a minute's silence before the games kick-off."