( CNN ) -- Health officials reported four more cases of a dangerous new virus in Saudi Arabia on Tuesday . Three of the patients diagnosed as having the novel coronavirus , or nCoV , are still being treated , a statement on the Saudi Health Ministry website said . The fourth has been discharged from a hospital . Experts : New SARS-like virus could show up in U.S. All four cases were in Saudi Arabia 's Eastern province , the statement said . NCoV was recently found for the first time in humans , and scattered cases have occurred across parts of the Middle East , particularly Saudi Arabia . It has proved deadly in more than half of the confirmed cases so far , the World Health Organization said . Read more : New SARS-like virus poses medical mystery . As of Sunday , the WHO had been informed of 34 laboratory-confirmed cases of human infection with nCoV worldwide since last September , including 18 deaths , it said . Coronaviruses , which are common around the world , often cause colds . The novel coronavirus acts like a cold in attacking the respiratory system , the Centers for Disease Control and Prevention have said . But symptoms are severe and can lead to pneumonia and even kidney failure .
Saudi Arabia reports four new cases of a novel coronavirus , or nCoV . Three of the patients are still being treated , and the fourth was discharged from a hospital . The virus is not known to have caused any deaths in humans yet.