Anti-government protests in Iran have turned increasingly violent with the deaths of at least 12 demonstrators and a police officer, raising the stakes as unrest on the streets has raged now for five days and confounded leaders who have struggled to respond.
Police said a man in the central city of Najafabad opened fire on officers with a hunting rifle as people took to the streets during what has become the largest protests in Iran since 2009.
The killing did not appear to be part of a coordinated attack and it was not clear what happened to the gunman. News of the officer's death came as thousands of Iranians took part in a fifth night of demonstrations, as security forces stepped up violent efforts to suppress them.
At least 10 people were killed around the country yesterday, according to state television, but opposition activists said the real death toll was likely to be higher.
Six people were reportedly killed after security forces opened fire in the western town of Tuyserkan and another two were shot dead in Izeh in the south-west.