A Russian court on Tuesday ordered that the pre-trial detention of Wall Street Journal reporter Evan Gershkovich, who has been held on accusations of espionage since March, be extended another three months.

He will be kept in custody until at least August 30, Russia state media outlet TASS reported.

The reporter’s pre-trial detention was supposed to expire on May 29, but investigators from Russia’s Federal Security Service (FSB) successfully petitioned the judge in his case to prolong it.

“The court received a request from the investigation to extend the preventive measure in the form of detention against the accused until August 30. The court session has already begun,” the report from TASS said.

Gershkovich was reporting on the Russian war effort from Moscow when he was detained on March 29 on charges of illegally obtaining “information constituting a state secret about the activities of an enterprise within Russia’s military-industrial complex.”