The global workforce reductions are expected to affect 3,700 jobs - about half of the company.
Attorney Shannon Liss-Riordan said she "will be monitoring the situation" at Twitter to ensure employees receive appropriate notice and compensation.
Tweets by the company staff said teams responsible for communications, content curation, human rights and machine learning ethics were among those gutted, as were some product and engineering teams
The firings of about half of the staff on Friday also may hit hard: The leaders of several of Twitter's diversity-focused groups were part of the job cuts, according to people familiar with the matter
Twitter employees were notified in an email that the layoffs were set to begin. Musk is expected to cut roughly half of Twitter's roughly 7,500-person workforce.
Some advertisers are concerned that Musk could scale back content moderation, which they worry would lead to an increase in objectionable content on the platform
Musk's Twitter deal is problematic in many ways, not least because there's no apparent synergy between an automobile company, an aerospace-cum-internet service provider, and a social media platform
Musk plans to cut about half the global workforce
There's nothing in this deal to cause anyone who believed the world's richest man was an untalented amateur to change their mind
From Elon Musk's Twitter layoffs to AAP announcing its CM candidate in Gujarat, catch all the live updates from across the globe here
Manuj Khurana, who quit his post as Tesla's local head of policy and business development in June, will start next week at Ather Energy
Twitter has started laying off employees in India as part of a global job cut ordered by the social media platform's new owner Elon Musk to attain economies of scale
At 1 PM (IST) on Friday, Bitcoin was trading at $20,591, up 2 per cent in the past seven days, and Ethereum was at $1,579, showing a jump of 5 per cent in the same period
Twitter intends to start cutting staff Friday, the company said in an email to employees. Musk plans to get rid of half the workforce
Twitter on mobile was working fine but users on the desktop version had some troubles logging into the platform
The outage is limited to Twitter's website for PCs and not the app, according to outage-tracker Downdetector
People in the know described the mood within the India development centres and across all segments as "very fearful", with people not sure if they will have a job or not
Twitter told its employees through an email that they would receive an alert on staff cuts on their official or personal IDs on Friday
"In an effort to place Twitter on a healthy path, we will go through the difficult process of reducing our global workforce on Friday," Twitter management said in an email reviewed by Bloomberg
Musk also intends to reverse the company's existing work-from-anywhere policy, asking remaining employees to report to offices -- though some exceptions could be made, the people said