Trooper Julie Judson said several passengers on the bus called 911 Monday night to report that it had been in at least one collision and wasn't stopping.
The bus hit a 2010 Ford Escape at 128th Street, but the bus continued to 160th before stopping.
Robert Rotta, 76, was a passenger in the SUV who died at the scene. Elizabeth Rotta, 75, was pronounced dead at Harborview Medical Center in Seattle at 2:12 a.m. Tuesday.
The driver, 51-year-old Kendall Rota, was also transported to Harborview and is in serious condition.
The bus driver told troopers his brakes weren't working, and that's why he didn't stop sooner. Troopers were investigating the condition of the bus, along with the cause of the accident.
"A piece of this will obviously be the inspection of the bus, establishing if there were any defects or if that was something that the driver felt was happening that didn't occur," said Judson.
Washington State Patrol spent the night analyzing the crime scene. Today, a full inspection of the bus will take place as troopers try to identify the cause of the accident.
It wasn't clear how many people were on the bus, but Judson said some did suffer minor injuries.
"This is the first time I've seen even a serious-injury collision involving a bus," Judson said. "I would feel very comfortable getting on one. I think commuters should consider themselves safe."
source- nwcn.com