Jared Kushner's real estate firm is being investigated by the U.S. Securities and Exchange Commission for its use of a federal program that grants visas to wealthy foreigners investing in the United States

The real estate company of Jared Kushner, President Donald Trump's senior adviser and son-in-law, is being investigated by the U.S. Securities and Exchange Commission for its use of a federal program that grants visas to wealthy foreigners investing in the United States, the Wall Street Journal reported on Saturday.

Kushner Cos was asked by the SEC for information on its use of the visa program, known as EB-5, in May 2017, according to a person the Journal said was familiar with the matter.

The EB-5 visa is a method for eligible immigrants to become lawful permanent residents, or 'green card' holders, by investing at least $500,000 into a business in the United States that will employ 10 or more American workers. Most holders are wealthy Chinese individuals.

The Journal said the company also received a separate request from New York federal prosecutors in the same month for information on development projects financed in part by the EB-5 program.

The latest revelation involving Kushner's firm came after Michael Wolff claimed in his new book, Fire and Fury, that Trump was considering his son-in-law as Secretary of State.

Kushner, Kushner Cos, the White House and New York prosecutors did not reply to requests for comment from Reuters. The SEC could not be reached for comment.

Kushner Cos referred the Journal to a previous statement on its use of the EB-5 program: 'Kushner Cos utilized the program, fully complied with its rules and regulations, and did nothing improper. We are cooperating with legal requests for information.'

Kushner Cos was asked by the SEC for information on its use of the visa program, known as EB-5, in May 2017. Kushner is pictured speaking to his father-in-law, President Trump, in December

Kushner resigned from his role leading Kushner Cos when he was appointed Trump's senior White House adviser early last year but still owns a stake in parts of the business. He is pictured above with his wife Ivanka and son Theodore in December

The exact subject of the SEC´s inquiry, or whether it identified particular projects, is not clear, the Journal reported.

The Kushners use of EB-5 visas to raise cash to finance developments came to broad attention in May last year, when Kushner´s sister, Nicole Kushner, spoke at a publicly advertised event in Shanghai to attract Chinese investment into a two-tower luxury apartment complex in New Jersey, called One Journal Square, being developed jointly by Kushner Cos and KABR Group.

The company later apologized for mentioning Jared Kushner's name while wooing investors.

The developers were seeking to raise $150 million, or 15.4 percent of funding for the project, from investors through the EB-5 visa program, according to marketing materials posted by the event´s organizer, immigration agency Qiaowai, Reuters reported at the time.

Kushner Cos is not a publicly traded company but the EB-5 is considered a securities offering, the Journal said, hence the SEC's interest.

Kushner resigned from his role leading Kushner Cos when he was appointed Trump's senior White House adviser early last year but still owns a stake in parts of the business, according to his most recent personal financial disclosure form, the Journal said.