England number eight Billy Vunipola was arrested in Majorca, Spain following an alleged incident on the island on Sunday.
The 31-year-old was detained in the early hours of Sunday morning, with local reports saying he has since been bailed, external pending an investigation.
Vunipola was reportedly tasered twice by police,, external who were called to a bar in the island’s capital, Palma.
Saracens, Vunipola’s club, say they are “aware” of the incident but will deal with it “internally”.
Vunipola has played for England on 75 occasions, with his last cap coming in the World Cup semi-final defeat by South Africa in 2023.
The former Wasps number eight was as second-half substitute for Saracens during their 15-12 victory against Bath on Friday night.
Saracens, who are second in the Gallagher Premiership, are not scheduled to play again until 11 May when they take on Bristol.