As protests in Iran entered their second week 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 an eye hospital in Tehran 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".
Meanwhile, international leaders called for the right to peaceful protest to be protected.
