Staff at three hospitals in Iran have told the BBC their facilities are overwhelmed with dead or injured patients, as major anti-government protests continue.
A medic at one Tehran hospital said there were "direct shots to the heads of the young people, to their hearts as well", while a doctor said an eye hospital in the capital had gone into crisis mode.
Two of the medical workers who spoke to the BBC said they treated gunshot wounds from both live ammunition and pellets.
On Friday, the US repeated that killing protesters would be met with a military response.
Iran blamed the US for turning peaceful protests into what it called "violent subversive acts and widespread vandalism".
Source: BBC