MADISON, Wis. — Gov. Scott Walker has ordered that all U.S. and Wisconsin flags be flown at half-staff at state buildings and military installations in honor of Cory Barr, the Sun Prairie firefighter killed in an explosion and fire earlier this week.

The directive is effective now through Saturday when a memorial service will be held for Barr. Authorities say Barr was off duty at the time of the gas leak in downtown Sun Prairie Tuesday, but went to the scene to help evacuate residents and business patrons from the area. Fire officials say dozens of people were evacuated from the area before a massive explosion and fire erupted from the gas leak.

Walker's order says Barr leaves behind a legacy of selflessness, service and commitment to his community.