Three adults and six children were in the motor home returning from a family vacation when a tire blew out and the driver lost control of the vehicle, according to state patrol.

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A child and an adult were killed and three others were critically injured Monday afternoon when a motor home pulling a trailer crashed on an Interstate 90 overpass near Ellensburg.

Three adults and six children were in the motor home returning from a family vacation when a tire blew out and the driver lost control of the vehicle around 3:30 p.m. near milepost 110, Washington State Patrol said in an emailed report. The vehicle went across the roadway, hitting the guard rail and entering the median, before tumbling down an embankment and coming to rest in a creek.

Lois Edelbrock, 61, was pronounced dead at the scene. Kaci Edelbrock, 6, was pronounced dead at the Kittitas Valley Healthcare Hosptial. Both were from Snohomish.

The rest of the passengers were seriously injured, except an 8-year-old boy who sustained only minor injuries, Trooper Brian Moore said by phone Tuesday.

Michael Edelbrock, 62, from Snohomish was airlifted to Harborview Medical Center and remains in serious condition, Harborview spokeswoman Susan Gregg said Tuesday. Jessica, 41, and Chase Edelbrock, 3, from Monroe are in satisfactory condition at Harborview, Gregg said.

Lane Edelbrock, 15, from Snohomish was transported to Kittitas Valley Healthcare. Cody, 13, and Hank Edelbrock, 6, from Snohomish and Monroe, were airlifted to Virginia Mason Memorial Hospital.

No other cars were involved in the accident, Moore said. Michael and Lane Edelbrock were the only passengers wearing seat belts, according to state patrol.

Both directions of Interstate 90 reopened around 9 p.m. Monday, the state patrol said.