A Tunisian policeman has been shot dead by two assailants on a motorbike in the coastal resort of Sousse where a jihadist gunman killed 38 tourists in June.
News agency AFP reports that "Unknown assailants fired on three policemen on a road. One of them was hit and died in hospital."
An investigation is underway.
Irish citizens are being advised to avoid non-essential travel to Tunisia in light of increased security concerns.
Mourners lay flowers after the massacre at the Tunisian coastal resort, Sousse.