The U.S. Senate on Monday voted to ban Moscow-based cyber security firm Kaspersky Lab’s products from use by the federal government, citing concerns the company may be a pawn of the Kremlin and poses a national security risk.

The vote is the latest in a series of setbacks in the United States for Kaspersky Lab, a 20-year-old anti-virus company that reaches 400 million customers globally and has vigorously denied that it conducts espionage on behalf of the Russian government.

The vote, which was included as an amendment to an annual defense policy spending bill approved on Monday by the Senate, seeks to codify and expand a decision by the Trump administration last week to order civilian government agencies to purge from their networks any Kaspersky Lab products.

U.S. lawmakers and intelligence officials have grown more alarmed about Moscow’s capabilities to conduct cyber espionage following a 2016 presidential contest that was marred by allegations of Russian interference.

In an exclusive article published on Forbes, Eugene Kaspersky denied these accusations,   stating “despite a lack of evidence as to the reasons why we're being targeted, one thing does seem to be crystal clear: we are caught in the middle of a geopolitical fight. And there will never be any evidence to prove these false accusations against us since we're innocent; but instead you'll just continue to see a lot of unfounded allegations, conspiracies and theories - which are alarmingly and unfortunately contagious.”