A Democratic congresswoman from Arizona is out of surgery and in critical condition after being shot in the head at a public event, according to CNN.
Gabrielle Giffords, 40, was hosting a "Congress on your corner" meeting outside a Safeway store in northeastern Tucson when an assailant opened fire.
The Washington Post has reported that Giffords is expected to survive.
Six others were killed, including Arizona Federal Court Chief Judge John Roll. President Barack Obama called it an "unspeakable tragedy".
Giffords represents one of 20 House Democratic districts that Republican Sarah Palin's political action committee had in the sights of gun targets before the 2010 election.
Last year, Giffords was elected for a third term in Arizona's eighth district, which encompasses the southeastern part of the state. She defeated a candidate supported by the Tea Party.
In her last interview before being shot, Giffords called for members of Congress to cut their pay by five percent. She called the debt and deficit the "greatest national security threat" facing the United States.
Giffords is married to astronaut Mark Kelly, who has been expected to head up a mission to the International Space Mission.
Giffords sits on the armed services and science and technology committees in the House of Representatives.