President Donald Trump's son-in-law, Jared Kushner, has been granted a permanent security clearance after operating under an interim clearance — or less — for more than a year.

In a statement to CNBC, Kushner's lawyer, Abbe Lowell, also said that his client sat "for two interviews with the Office of Special Counsel."

The second interview lasted for more than six hours, and included questions regarding the Trump campaign and the transition period before the presidential inauguration, as well as the Comey firing, NBC reported, citing a source familiar with the interview.

Kushner, a senior White House advisor, had reportedly met with special counsel Robert Mueller's team for the first time in November as part of the probe of potential links between Trump's presidential campaign and Russia.