"The searches that are being conducted are linked to a TASS employee," agency spokeswoman Yekaterina Titova told AFP.
"They are related to this employee's former workplace and are not in any way linked to TASS."
She gave no further information.
Founded in 1904, TASS employs more than 1,500 people in Russia and abroad, and is represented in 63 countries, including North Korea.
Russian media have reported that the agency, which celebrated its 110th anniversary in September 2014, is struggling to pay salaries of employees based outside Russia because of the ruble's drastic devaluation.
TASS - known as the Telegraph Agency of the Soviet Union between 1925 and 1991 - was renamed ITAR-TASS after the collapse of the Soviet Union.
The agency was rebranded TASS in 2014.
