Per NYT: Some internal estimates showed that at least 1,200 full-time employees resigned on Thursday, three people close to the company said. Twitter had 7,500 full-time employees at the end of October, which dropped to about 3,700 after mass layoffs earlier this month.

The employee numbers are likely to remain fluid as the dust settles on the exits, with confusion abounding over who is keeping a tally of workers and running other workplace systems. Some employees who quit said they were separating themselves from the company by disconnecting from email and logging out of the internal messaging system Slack because human resources representatives were not available.

One team known as Twitter Command Center, a 20-person organization crucial to preventing outages and technology failures during high-traffic events, had multiple people from around the world resign, two former employees said. The “core services” team, which handles computing architecture, was cut to four people from more than 100. Other teams that deal with how media appears in tweets or how profiles show follower counts were down to zero people.