Senate Intelligence Committe Chairman Richard Burr, R-N.C., said the committee's portion of the investigation looking into the memos of former FBI Director James Comey has likely reached an end, but isn't forever closed off, adding that, "we have exhausted every person we can talk to," on the matter.

"Questions that you might have surrounding Comey's firing are better answered by the general counsel or by the justice department, not the select committee of intelligence in the United States senate. There are concerns that we continue to pursue," Burr said.

Burr also said committee has interviewed seven people related to the "Mayflower" meeting, the hotel meeting in 2016 in which members of the Trump campaign, including Trump and Jeff Sessions, were in a small meeting that also included then-Russian Ambassador Sergei Kislyak.

The chairman said the Russia investigation expanded slightly since it was first conceived in Janurary, but said that the committee is not yet ready to close the investigation, saying there was a general consensus among staff to trust a full report earlier in the year from the intelligence community, but more fact-checking should be done.

In conducting the investigation since it first began in January, the committee says 100-plus people have been interviewed, amounting to 250-plus hours of inteview time, about 4000 pages of transcripts, and about 100,000 pages of information reviewed by the intelligence committee staff. Interviewed individuals from around the world.

Still to come in the course of the investigation is an open meeting in November with representatives from Facebook and Twitter, as advertising issues and automated "bot" accounts have become a greater cause of worry for having the ability to steer discourse in social media or spread propaganda from foreign entities.

Burr began the meeting by acknowledging the tragedy in Nevada earlier this week and praised local law enforcement.