The Hill News

Arizona Sen. John McCain (R) will return from a congressional delegation trip to attend a memorial service for the victims of a shooting spree in his home state that resulted in the wounding of Rep. Gabrielle Giffords (D). 

Brooke Buchanan, a spokeswoman for McCain, told The Hill he is cutting his trip short to go to the memorial in Tucson, Ariz., where the shooting took place.

McCain is traveling in South America with his Senate GOP colleague Tom Barrasso (Wyo.) The two were scheduled to visit Colombia, Chile, Brazil, Mexico and Panama.

President Obama will also be in attendance for the service Wednesday evening. The shooting, allegedly carried out by Jared Lee Loughner, killed six and injured more than a dozen others, including the congresswoman.

Federal District Judge John Roll and Giffords community outreach director Gabriel Zimmerman were among those killed.