WASHINGTON — Former National Security Adviser Michael Flynn turned over about 600 pages of documents Tuesday to the Senate intelligence committee as part of its investigation into Russia’s meddling in the 2016 presidential election, according to a congressional aide.

The aide said the committee’s investigators immediately began reviewing the information to determine the extent of what Flynn provided. The aide spoke on condition of anonymity to discuss the committee’s sensitive work.

Sen. Mark Warner of Virginia, the ranking Democrat on the Senate intelligence committee, confirmed the panel had received documents from Flynn, but declined to characterize the material or say how many pages had been received.

“We can’t make any judgment on whether he’s fully complied because we’ve got to review the documents,” Warner said.