Islamic State militants have reportedly destroyed another irreplaceable ancient artifact in the ancient Syrian city of Palmyra.
Activists say Islamic State blew up the city's Arch of Triumph, describing it has having been "pulverized."
The Syrian Observatory for Human Rights says the arch had ornaments that Islamic State militants considered blasphemous.
If the destruction is confirmed by satellite images, it would be the third ancient site destroyed since the Islamic State group seized Palmyra in May.
Two Roman-era temples already have been blown up.
The extremists consider ancient historic artifacts and images to be blasphemous. The United Nations and historians regard such actions to be war crimes.