Deputy Attorney General Lisa Monaco has asked the Justice Department's inspector general to investigate the department's handling of a leak investigation into former President Donald Trump's political enemies that included a subpoena to collect metadata of lawmakers, staff and some family members, according to a Justice Department official.

The request comes as House Intelligence Committee Democrats hold a briefing at which Chairman Adam Schiff is expected to talk with his members about what the committee has learned, a source familiar tells CNN.

The activity follows the bombshell revelation that prosecutors in the Trump administration Justice Department subpoenaed Apple for data from the accounts of House Intelligence Committee Democrats along with their staff and family members as part of a leak investigation.

The prosecutors were looking for the sources behind news stories about contacts between Russia and Trump associates.

(With input from agencies)