Twitter will roll out verified gold and grey tick marks as it relaunches the coveted blue tick service next Friday, Chief Executive Officer Elon Musk said in a tweet, after holding off the rollout earlier this week.

"Gold check for companies, grey check for governments, blue for individuals (celebrities or not). Painful, but necessary," Mr Musk said in a tweet.

All verified accounts will be manually authenticated before the tick is activated, Mr Musk said.

"Individuals can have a secondary tiny logo to show they belong to an organisation if verified as such by that organisation," Mr Musk said in another tweet, adding that he will give a longer explanation next week.

The company had paused its recently announced $8 blue tick subscription service as fake accounts mushroomed, and had said the sought-after blue tick subscription service will be relaunched on 29 November.

The blue tick mark was previously reserved for verified accounts of politicians, famous personalities, journalists and other public figures.