The site Hyperloop One is using to test its sled. (credit: Hyperloop One)

In a new lawsuit filed Tuesday, the remaining executives at startup Hyperloop One accused four former employees, including former co-founder and CTO Brogan BamBrogan, of a slew of breaches of duty to the company. The suit comes just a week after those four former employees sued Hyperloop One, accusing the remaining executives—including co-founder Shervin Pishevar—of mismanaging the company, mistreating the engineers, and even placing a “hangman’s noose” on BamBrogan’s desk.

The Los Angeles-based Hyperloop One had enjoyed some real success in prior months. The startup is trying to build a Hyperloop—a train-like method of transportation imagined by Tesla and SpaceX CEO Elon Musk that would use a low-pressure tube and magnetism to propel pods of cargo or humans at 700mph. In May, the company successfully tested the propeller mechanism for its test track in North Las Vegas.

But rifts within the company were apparently already growing. The cross-complaint from Hyperloop One is just as incendiary and intrigue-filled as the original complaint, with accusations of screaming, sexist comments, and poor performance. Hyperloop One is demanding $250 million in damages from the four former employees.