State Rep. John Allen, R-Scottsdale, wants to increase security at the state Capitol.

He's sponsoring a bill that calls for adding vehicle barriers outside the state House, Senate and executive branch office buildings in Phoenix.

Allen says the cheapest way to stop vehicles from being able to drive up to one of the buildings with explosives would be to fill posts with concrete and space them close enough together for pedestrian access but to prevent vehicle access.

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Allen estimates this plan could cost $250,000.

“Today at the Capitol, we have no security to keep someone from doing mass harm to us,” Allen says.

But not all of his colleagues are on board with the plan, seeing firearms as a potentially bigger threat than vehicles with explosives.

“To me, it almost seems like that might be more of a threat, the fact that someone can bring a gun into our committee hearings or into the gallery," says Rep. Justin Olson, R-Mesa.

But large-scale attacks, the kind that could stop the state government from functioning, are a bigger concern, Allen says.

The bill was held in the House Appropriations Committee, but Allen says his goal in introducing it wasn't to get the bill passed, but rather to get the lawmakers talking about security at the Capitol.