YouTube has been deleting comments critical of China's ruling party due to a software flaw, the company said on Tuesday (May 26) in reaction to criticism of the practice.
Users of the online video giant, a division of Alphabet's Google, flagged that certain comments posted below videos critical of the Chinese Communist Party were quickly deleted.
"This appears to be an error in our enforcement systems and we're investigating," a YouTube spokesman said in an email.
The spokesman said the issue was not the result of a policy change.
Some comments posted in Chinese language, such as "communist bandit" and "50-cent party," a derogatory term for the ruling party, were deleted within seconds.
YouTube's automatic filters eliminate comments that violate company policies.
The Verge reported the issue earlier on Tuesday.
Google removed its search engine from mainland China in 2010, citing security and censorship concerns.
A Google project to create a censored search service for the country, called Dragonfly, was killed the previous year after protests from employees and US politicians.