Dan Thomas has resigned as leader of Reform Wales following his arrest on suspicion of assault, the party has confirmed.
Gwent Police acknowledged that an arrest had been made on suspicion of assault. Authorities did not provide further detail in the initial confirmation.
Thomas issued a statement saying he had "done nothing wrong". He has not provided additional comment beyond denying wrongdoing.
The resignation removes Thomas from the leadership of the regional party and will require Reform Wales to appoint an interim or permanent successor. The circumstances surrounding the allegation and any potential legal proceedings have not been disclosed publicly.