The full extent of the injuries will not be known until O'Connell and Cullen return home for further medical examination.
With Cullen and Connolly joining an injury list that includes John Kelly and Rob Henderson, Munster find themselves short of centre options for the Celtic League game against Llanelli on Tuesday next, their last outing before the Heinken Cup final.
Their opponents on May 20th, Biarritz, were beaten in the French championship today in Pau, which means they must defeat Montpelier next weekend to maintain interest in a top four play off spot.
Meanwhile, ERC, Heineken Cup organisers, have confirmed that Munster will receive an additional allocation of close to 3,000 tickets for the much anticipated Heineken Cup final.
The second allocation of 3000 tickets to Munster Rugby comes after a final reconciliation of all stakeholder allocations and includes 600 extra seats which are being especially installed in the Millennium Stadium to meet demand for the final. The tickets will be distributed by Munster Rugby.
The additional tickets will go to servicing the demands from the normal Munster outlets such as Munster clubs - the majority of the extra allocation will be distributed through the clubs as previously agreed - Munster Supporters Club, Schools, Commercial Partners and Sponsors all of whom requested more tickets than Munster were able to supply from their original allocation (7500).