BEIJING -- China's cyberspace authority Monday warned computer users to install and upgrade security software to avoid being hit by the global ransomware attack.

A statement issued by the cybersecurity coordination bureau of the Cyberspace Administration of China said the "WannaCry" ransomware attack, which began to spread worldwide Friday, has affected some enterprises and government offices in China.

Police, authorities in the industry, information technology, education, banking and cyberspace sectors as well as some computer security companies have taken response measures, the statement said.

Media reports have also helped increase public awareness of the virus and contain the spread of the attack, it added.

The authority said this global cyberattack has once again shown the unprecedented internet security challenges, calling on all sectors to address to cybersecurity issues.