This undated image provided Thursday, Aug. 11, 2011 by the U.S. Navy shows Petty Officer 1st Class Jon T. Tumilson, 35, of Rockford, Iowa. Tumilson was killed along with other SEALs in the Afghan Helicopter crash on Saturday, Aug. 6, 2011. (AP Photo/U.S. Navy)

ROCKFORD — Funeral services will be on Friday for a Navy SEAL from Iowa who was among the Americans who died aboard a downed helicopter in Afghanistan.

Services for Petty Officer 1st Class Jon Tumilson, 35, of Rockford, are scheduled for 10 a.m. at the Rudd-Rockford-Marble Rock Community School in Rockford. Burial will be at Riverside Cemetery in Rockford.

Thirty Americans and eight Afghans were killed Aug. 6 when a rocket-propelled grenade fired by a Taliban insurgent downed their Chinook helicopter en route to a combat mission.

Memorial arrangements are being handled by the Hauser Funeral Home in Charles City.