OCCRP’s articles have also accused state-sponsored hackers in India of using Israeli-made Pegasus spyware to target government critics.
The government has previously denied both allegations.
The BJP has previously accused Gandhi, the OCCRP and 92-year-old billionaire financier-philanthropist George Soros of attacking Modi.
On Thursday, it cited a French media report that said that OCCRP was funded by the US Agency for International Development and “other deep state figures” like Soros.
“The Deep State had a clear objective to destabilise India by targeting Prime Minister Modi,” the BJP said in a series of messages on X.
“It has always been the US State Department behind this agenda … OCCRP has served as a media tool for carrying out a deep state agenda,” it said.
Sambit Patra, a BJP national spokesperson and lawmaker, repeated the accusations at an official media briefing by the party on Thursday.
“A French investigative media group … has revealed that … 50 per cent of OCCRP’s funding comes directly from the US State Department,” Patra said.
“OCCRP has served as a media tool for carrying out a deep state agenda.”
The State Department, US AID, Soros and the Congress party did not immediately respond to requests for comment. The Indian foreign ministry also did not respond to a request for comment on the ruling party’s accusation against the State Department.
OCCRP said in a statement it was an independent media outlet and not associated with any political party.
“The US government, while providing some funding to OCCRP, has no say in our editorial processes and no control over our reporting,” it said.
The government has lately been facing heat over the US indictment of Gautam Adani, who opposition leaders say Modi has always protected, and the country’s parliament was suspended multiple times last week as opposition lawmakers demanded a discussion on the issue.
Modi’s BJP and Adani have denied the accusations.