Peck ? A 10-year-old girl and an 11-year-old boy were killed Saturday when a pickup truck ran a stop sign and hit the van they were riding in, authorities said.

Three others in the van, which was en route to a family event, were injured. All the occupants were related, said Lt. Phil Bostian of the Kansas Highway Patrol.

Kathrine Tredway, 10, and Thomas Alexander, 11, both of Wellington, were pronounced dead at the scene.

Michaela Alexander, 9, and her mother, Debra Alexander, 37, both of Haughton, La., were taken to Via Christi Regional Medical Center-St. Francis Campus in serious condition.

Linda Terry, 60, of Wellington, was listed in fair condition.

The driver of the pickup, Lanny Carter, 45, of Salina, was not seriously injured. All the passengers in the van were wearing seat belts, Bostian said.

The collision was south of Wichita near Peck.