WASHINGTON, D.C. — Following months of subway safety problems, service disruptions and financial issues, the Washington Metropolitan Area Transit Authority fired 20 managers in what GM Paul J. Wiedefeld described as a step toward “restructuring,” The Washington Post reports.

The 20 managers, more than one-third of which worked in subway operations, were among about 650 “at-will” employees of the transit agency, meaning they could be let go at the GM’s discretion. The firings were effective immediately, according to the report.

Wiedefeld has vowed to streamline the organization, which employs about 13,000 people, a vast majority of whom are members of three labor unions. WMATA declined to specify what departments the fired managers worked in or what any of the managers’ individual job responsibilities were. For the full story, click here.