Senior Palestinian official Saeb Erekat is in a critical condition with Covid-19 and has been placed on a ventilator, the Israeli hospital treating him says.
On Sunday, the 65-year-old was rushed to the Hadassah Medical Center in Jerusalem from his home in Jericho, in the occupied West Bank.
His condition was described as "serious but stable", and he was given oxygen.
On Monday morning, the hospital said Mr Erekat's condition had deteriorated and was "now defined as critical".
"Due to respiratory distress, he was put on a ventilator and placed in a medically induced coma," a statement added.
The hospital said treating Mr Erekat was a "huge challenge" because he had undergone a lung transplant three years ago and had a "weakened immune system and bacterial infection, in addition to coronavirus".