Signature Bank was hit with a class-action suit Tuesday in the Eastern District of New York, two days after it was closed by regulators amid a tumultuous week in the banking world.

The New York-based bank has yet to enter an appearance in the suit, which was filed by Phillip Kim and Laurence M. Rosen of The Rosen Law Firm. It is believed to be the first civil suit filed against Signature, which closed days after California’s Silicon Valley Bank collapsed in the second-largest bank failure in U.S. history.