Officials in Turkey are giving conflicting reports on what caused the death of a man at an anti-government protest in a city near the border with Syria.

The Hatay province governor's office says the 22-year-old man was shot Monday during a demonstration in Antakya and later died in a hospital. It suggested Tuesday that he may have been shot by demonstrators trying to inflame tensions, saying police had been fired on during the protest.

But the province's chief prosecutor, Abdullah Comert, says that an autopsy showed that the man received a blow to the head but there was no trace of a gunshot wound. It said authorities had launched an investigation into the death.

Thousands have joined anti-government rallies across Turkey since Friday.