BUCHAREST, Romania—A fire early Friday at a key hospital in Bucharest that also treats COVID-19 patients killed at least five people, authorities said. The fire broke out around 5a.m. (0300GMT) on the ground floor of the hospital and forced the evacuation of more than 100 people. Some hospital staff could be seen later still wearing protective suits and face masks after rushing out. An unspecified number of people were injured before firefighters put out the blaze, Romanian emergency services said in a preliminary report. It was not immediately clear what caused the fire. Later on Friday, dozens of people protested outside the hospital demanding resignations of top officials. Some lit candles for the victims. It was the third such incident in the past several months. A fire at a COVID-19 intensive care unit in north Romania last November killed 10 people and another one at a psychiatric hospital in the …