Wales back Owen Williams will miss the rest of this season's Guinness Six Nations due to a hamstring injury.
The Gloucester player, who can fill fly-half and centre roles, was injured during the warm-up ahead of Wales' clash against Ireland in Dublin on Saturday.
Williams was due to be on the bench for Saturday's 24-14 defeat to Ireland but was replaced by Jarrod Evans at the last minute.
"Owen Williams sustained a hamstring injury in the warm-up ahead of Wales' fixture against Ireland at the weekend," WRU said in a statement.
"Further assessment has concluded that the injury will rule Williams out of the remainder of Wales' Six Nations campaign."
Williams won all three of his Wales caps in 2017 and has endured an injury-hit spell in his career since then.
Wing Josh Adams, though, will be back in full training this week after being injured at the Aviva Stadium.
Adams, scorer of 10 tries in his last nine Tests, went off midway through the first half after taking a knock to his hip, and he was replaced by Johnny McNicholl.
But the WRU said that 24-year-old Adams will fully train this week. Wales' next Six Nations game is against France in Cardiff on 22 February.