Pope Francis’ doctor found the pontiff with his eyes open and breathing normally, but unresponsive when he was called to the Vatican early Monday morning, the Italian newspaper Corriere della Sera reported Thursday.

Pope Francis died quickly on Monday morning from an unexpected stroke without suffering undue pain, and there was nothing that doctors could have done to save his life, the head of the pontiff's medical team said in interviews published on Thursday.

The funeral is expected to draw tens of thousands of Catholic faithful, as well as world leaders including President Trump.

A cardinal who was sentenced to five and a half years in prison after being convicted of embezzlement said Tuesday he intends to participate in the next conclave — the election to pick Pope Francis’ successor — even though the Holy See press office has declared him a “non-elector.

Any baptized Catholic male is eligible, though only cardinals have been selected since 1378. The winner must receive at least two-thirds of the vote from those cardinals under age 80 and thus eligible to participate.