Google announced on Thursday that it was shutting down 210 YouTube channels that were behaving in a "coordinated manner while uploading videos related to the ongoing protests in Hong Kong".

Axar.az reports citing foreign media that Google did not give details of how popular the 210 channels were, nor how many videos had been posted to them.

"This discovery was consistent with recent observations and actions related to China announced by Facebook and Twitter," Shane Huntley from the Threat Analysis Group at Google Security said in a blog post.

"We found use of VPNs and other methods to disguise the origin of these accounts and other activity commonly associated with coordinated influence operations," he added.

Hong Kong leader Carrie Lam said again on Tuesday the legislation was dead.

Protesters at mass demonstrations are calling for greater democracy in the city and an inquiry into alleged police brutality during past protests.

Axar.az reports citing foreign media that Google did not give details of how popular the 210 channels were, nor how many videos had been posted to them.