Inside the Canadian Parliament as Gunfire Is Heard

— -- Greta Levy was lying on a polished hallway floor in the ornate Canadian Parliament building when she saw a man approaching with a gun. Moments later gunfire erupted.

By the time Levy, the press secretary for Canada's New Democratic Party, was on the floor, a soldier at the country war memorial had already been fatally wounded and the Parliament was going into lockdown with government officials barricading themselves and hiding in offices.

Levy was walking in the hallway of the main Parliament building when she and a colleague heard yelling and got on the ground. She hesitated only briefly before joining a colleague and a tourist on the floor.

"For whatever reason I then lifted my head and saw a man coming up the ramp that leads into Centre Block walking not fast, purposefully, and carrying a gun," Levy told ABC News. "And as soon as I saw the gun I looked back down, and a few seconds later, the shooting started."

The sprawling building remained on lockdown for hours and Members of Parliament used social media to get word of their safety to loved ones.

Michelle Rempel, a member of the Conservative Party representing parts of Calgary, sent a message to her mother and told a friend that she was unable to speak directly because she doesn't have her cell phone with her as she hides.

A CTV reporter inside the building shared a photo of people inside the caucus room after the shooting, showing chairs blocked up against the interior of the doors as a makeshift barricade.

Another MP Mark Strahl called the ongoing situation "very tense."

Out of fears that the suspect is still on the loose, fellow Conservative MP Kyle Seeback kept details about his location vague.

One of his colleagues, Tony Clement, said they were hiding together in the building.