Twitter cuts costs again and again by firing at least 50 people.

The Information said that Elon Musk’s Twitter fired dozens of people on Saturday. This is at least the eighth round of layoffs since Musk took over the social network in late October.

Multiple engineering teams were affected by the job cuts, including those that worked on advertising technology, the main Twitter app, and the technical infrastructure that keeps Twitter’s systems up and running, a US technology-focused publication reported early on Sunday, citing people with direct knowledge of the situation.

Reuters asked Twitter for a comment, but Twitter didn’t answer right away.

Musk, who bought Twitter for $44 billion, fired about 3,700 employees at the beginning of November to cut costs.

The Information said that the latest job cuts are meant to make up for a drop in sales after Musk took over and further reduce a staff that had already been cut by at least 70% to about 2,000 people.

Musk said in November that the service was seeing a “massive drop in revenue” because advertisers were pulling money out of the service because they were worried about how it moderated content.