Special counsel Robert Mueller’s is investigating Jared Kushner’s efforts to get a cash infusion from Chinese and other foreign investors during the presidential transition, a new report said Monday.

Mueller’s investigators have been asking witnesses about Kushner’s attempts to get the money for the financially troubled office building at 666 Fifth Ave. in Midtown, CNN reported, citing people familiar with the investigation.

Mueller’s team is scrutinizing talks Kushner had with Chinese investors during the transition, the sources said.

A week after Trump’s election, his son-in-law met with the chairman and other bigwigs from Anbang Insurance, the Chinese conglomerate that also owns the Waldorf Astoria, The New York Times had reported.

Kushner divested from the Fifth Avenue property, which his family’s company bought in 2007 for $1.8 billion.

At the time, Kushner and Anbang’s chairman, Wu Xiaohui, were close to cutting a deal for the Chinese insurance giant to invest in the Fifth Avenue — but talks collapsed in March, according to the Times.

The building lost money during the housing crisis and recession, and in 2011 Vornado Realty Trust stepped in with financing, taking on a 49.5 percent share of the building, which more than $1.4 billion in debt, according to a report Vornado released in March.

Vornado announced last week it was selling its stake. “We do not intend to hold this asset on a long-term basis,” they said in a regulatory filing, the network reported.