President Trump’s adviser and son-in-law Jared Kushner used the encrypted messaging service WhatsApp as well as his personal email account to conduct official business, a top House Democrat charged Thursday.

The revelation came during a Dec. 19 meeting of the House Oversight and Reform Committee, which released the information in a letter Thursday.

Chairman Elijah Cummings wrote to White House counsel Pat Cipollone to tell him that Kushner’s lawyer, Abbe Lowell, had confirmed during the meeting that Kushner “continues to use” WhatsApp to conduct White House business.

But Lowell said Kushner was not violating federal law requiring official communications to be preserved because he takes screenshots of his messages and then sends them to his White House email account, Cummings wrote.

Kushner, whom the president put in charge of finding peace in the Middle East, regularly communicates with Saudi Crown Prince Mohammad bin Salman via WhatsApp, Politico reported.

It was unclear whether Kushner continued to use WhatsApp after the December meeting.

Cummings said Lowell also told him and then-South Carolina GOP Rep. Trey Gowdy, who was the chair at the time of the December meeting, that first daughter and presidential adviser Ivanka Trump conducts official White House business on her personal email account.

“These communications raise questions about whether these officials complied with the Presidential Records Act and whether the White House identified this personal email use during its internal review and took steps to address it,” Cummings wrote.