Attorney General Eric Holder is heading to Oak Creek, Wisconsin Friday.
Holder is scheduled to deliver remarks at a memorial service for the victims of the Sikh Temple shooting.
Six people died in the rampage Sunday and three others were injured.
Police say the 40-year-old suspect, identified as Army veteran Wade Michael Page, then killed himself.
The mass shooting happened just over two weeks after a similar massacre at an Aurora, Colorado movie theater.
Twelve people died in that shooting when a gunman started shooting during a film premiere..