Egypt confirmed on Saturday 33 new cases of coronavirus on a cruise ship on the River Nile that officials said the previous day had been struck by the virus, the health minister said. None of the cases were showing symptoms of the illness, Health Minister Hala Zayed told reporters. Over 150 tourists and local crew were in quarantine Saturday in the southern city of Luxor after the virus cases were detected on Friday, authorities said. A Taiwanese-American tourist who had previously been on the same ship tested positive when she returned to Taiwan. The World Health Organization informed Egyptian authorities, who tested everyone on the ship. Health authorities found a dozen of the ships Egyptian crew members had contracted the fast-spreading virus, but did not show symptoms, according to a joint statement from Egypts Health Ministry and the WHO on Friday. The trip started from Luxor, some 655 kilometers (405 miles) south of Cairo, on Sunday and the cruise ship, which includes 60 rooms, made three stops before reaching Aswan. On the way back there were three more stops, potentially expanding the number of people exposed to the virus. The countrys national air carrier, Egypt Air, has suspended direct flights to China since late January. The virus, which originated in China, has infected more than 100,000 people globally. The previous three cases in Egypt were a Chinese and a Canadian national, then an Egyptian who was in Serbia and had stayed for 12 hours in France before arriving in Cairo. Egyptian authorities said Friday that tests on over 2,500 people came back negative for the virus.