Evan Gershkovich
The Lefortovo Court of Moscow ruled that the journalist will remain in pretrial detention until at least August 30, according to a state news agency.
The Kremlin said the US was "undoubtedly" behind a drone strike targeting Russian President Vladimir Putin.
The Wall Street Journal reporter said he was "deeply touched by all the letters" of support he has received while he remains held in Russia's Lefortovo prison.
Russia accused the Wall Street Journal reporter of spying — with no proof — which carries a maximum sentence of 20 years in prison.