Toulon back James O'Connor was hospitalised following a match last weekend and is still undergoing precautionary health checks, the French club said without giving further details.

Three-time European champion Toulon posted a brief statement on its website todayfollowing reports the 25-year-old Australian had a heart problem on the team bus returning from a match against Oyonnax last Monday (NZT).

French specialist rugby newspaper Midi Olympique reported that O'Connor, who has played 44 tests for Australia but was overlooked for last year's World Cup, was given emergency treatment by teammate and Georgia lock Mamuka Gorgodze on the bus before being hospitalized for three days.

Toulon only said that O'Connor would undergo "all the (medical) tests necessary" before being able to return, but that his career is not in danger.