RCMP Commissioner Bob Paulson says the OPP's much-anticipated report into the RCMP's response to the Parliament Hill shootings will be released this week or next.

Paulson told the Senate's national security committee Monday his force are on the verge of releasing the report.

The report was commissioned by House Speaker Andrew Scheer after he asked for an independent police investigation following the Parliament Hill shootings.

The OPP led the investigation and submitted the report to the House of Commons in early April. When it was delivered, there were initial concerns whether the report would be made public or not.

Paulson told senators the report examines the RCMP's response to the Oct. 22, 2014 shooting, both outside Parliament Hill and inside Centre Block. That's where shooter Michael Zehaf-Bibeau was finally shot and killed.

Paulson also told senators the Mounties will release the remaining 18 seconds of the Zehaf-Bibeau cellphone video in the coming weeks. Zehaf-Bibeau recorded the video immediately before the fatal shooting.

The RCMP already released 55 seconds of the video at a Commons public safety committee meeting in March.

"This is in retaliation for Afghanistan and because [Prime Minister Stephen Harper] wants to send his troops to Iraq," Zehaf-Bibeau, says in the video.

"Canada's officially become one of our enemies by fighting and bombing us and creating a lot of terror in our countries and killing us and killing our innocents. So, just aiming to hit some soldiers just to show that you're not even safe in your own land, and you gotta be careful.​"

In March, Paulson told reporters the remaining 18 seconds was edited for "sound operational" reasons. Thirteen seconds were cut from the beginning of the video and five seconds were edited from the end.