An investigation has found that a lavish Bahamas wedding involving Donald Trump Jr. was quietly financed by a Russian oligarch with close ties to Vladimir Putin, raising fresh questions about the financial relationships surrounding the Trump family’s business and social circles. The funding arrangement was reportedly structured to obscure the oligarch’s direct involvement.

The revelation adds to a long list of previously reported financial entanglements between figures in the Trump family’s orbit and wealthy Russian nationals, a pattern that has drawn sustained scrutiny from investigators, journalists and congressional committees over the years.

Representatives for the Trump family have not provided a detailed response to the specific financing arrangement described in the investigation. The findings are likely to renew calls from congressional Democrats for further disclosure of the family’s financial relationships with foreign nationals.