Tucsonans are reacting to Friday's shooting at a Newtown, Conn., elementary school in which 20 children and six adults were killed.

Community members gathered at a vigil at Roberts Elementary School in Tucson Sunday evening. U.S. Rep. Ron Barber. Barber, D-Tucson, addressed the audience.

Barber was wounded in a shooting on the city's northwest side Jan. 8, 2011 when six were killed and a dozen others, including then Congresswoman Gabrielle Giffords, were injured.

Barber issued a statement about the shooting as well.

"All of Tucson and Southern Arizona as well as the entire nation stand with the people of Newtown," he wrote, and added that his own thoughts and prayers go out to the victims, their families and friends, and the first responders who attended to the shooting and its victims.

In a Facebook message responding to the shooting, Mark Kelly, Giffords' husband, called for a response that "must consist of more than regret, sorrow and condolence."

"The children of Sandy Hook Elementary School and all victims of gun violence deserve leaders who have the courage to participate in a meaningful discussion about our gun laws," he wrote.

Tucson police officials issued a statement extending their sympathy to the Newtown community. The Tucson Police Department said it will increase its presence at or near schools throughout the city as a precautionary measure.