(CNN) -- A judge has entered a plea of not guilty on behalf of accused Fort Hood shooter Army Maj. Nidal Hasan, just days before a jury is to be chosen in his court-martial.
Hasan refused to enter a plea at a hearing on Tuesday, according to a release from Fort Hood.
A devout Muslim who opposed the war in Afghanistan, Hasan is charged with opening fire on military personnel at Fort Hood in November 2009. Thirteen people were killed and more than 30 others were hurt.
Hasan fired his private attorney in 2011 and recently said he did not want military attorneys to represent him. Judge Col. Tara Osborn ruled last month that Hasan could represent himself but that military lawyers would help him.
Jury selection in the long-delayed court-martial is set to begin July 9.