As protests in Iran continue and Iranian authorities issued coordinated warnings to protesters, a doctor and medic at two hospitals told the BBC their facilities were overwhelmed with injuries.
One doctor said a Tehran eye hospital had gone into crisis mode, while the BBC also obtained a message from a medic in another hospital saying it did not have enough surgeons to cope with the influx of patients.
On Friday, US President Donald Trump said Iran was in "big trouble" and warned "you better not start shooting because we'll start shooting too".
Iran in a letter to the UN Security Council blamed the US for turning the protests into what it called "violent subversive acts and widespread vandalism".
BBC