From the Associated Press:

...Lt. Sheila Lorance of the Marion County Sheriff's Office, the lead agency in the case, did not have an explanation Sunday for why the officers took the bomb into the bank.

Woodburn Police Chief Scott Russell remained in stable but critical condition Sunday at a Portland hospital as a result of the blast that killed Woodburn police Capt. Tom Tennant and Oregon State Police Senior Trooper William Hakim....