World Health Organization Director-General Tedros Adhanom Ghebreyesus washes his hands as he arrives at Bunia National Airport in Congo on May 30. BUNIA, Congo - The World Health Organization chief traveled on Saturday to the Congolese province hardest hit by an Ebola outbreak, urging residents to seek treatment and practice safe burials as officials scramble to contain the fatal disease. The outbreak -- the 17th in Congo and the third-largest since Ebola was discovered half a century ago -- is outpacing the global response, something WHO Director-General Tedros Adhanom Ghebreyesus acknowledged this week before traveling to Kinshasa on Thursday. His visit came as Brazil said on Saturday it was investigating a suspected Ebola case in Sao Paulo state involving a man who recently visited Congo. Authorities said the patient was in isolation at a specialist hospital. After meeting Prime Minister Judith Suminwa Tuluka on Friday, Tedros flew on Saturday to Bunia, capital of Ituri province, where the first cases were confirmed earlier this month.

Fox News Flash top headlines are here. Check out what's clicking on Foxnews.com. Extremist rebels in eastern Congo killed at least nine people with knives and guns, a civil society organization said Friday. The attack happened Thursday evening on the Kyondo-Kyavinyonge road in North Kivu province, said Meleki Mulala the coordinator for the Congolese civil society group for the Ruwenzori sector. Civilians were taken from their homes before they were killed, and many homes were looted, he said.