Curtis, Mallet-Prevost, Colt & Mosle has filed a lawsuit on behalf of its client, the Republic of Kazakhstan, after the Gmail accounts and computers of several government officials were hacked and their contents posted online, exposing communications between the officials and the firm.

New York-based Curtis litigation partner Jacques Semmelman, who represents the government of Kazakhstan, filed the complaint on Thursday against “Does” in the U.S. District Court in the Southern District of New York. Meanwhile, officials in Kazakhstan have launched an investigation into the identity of the hackers and the scope of their breach.