Postal Service Mailbox Explosion Possibly Caused By Pipe Bomb

ARVADA, Colo. (CBS4) – Inspectors with the U.S. Postal Service have joined Arvada police in an investigation into how a Postal Service mailbox was destroyed overnight.
The mailbox was located in a parking lot on the 9500 block of Ralston Road, and police said it’s possible a pipe bomb caused the damage.
Arvada police said several people called about a suspicious noise at 2:30 a.m. Police responded but were unable to determine what the calls were about because they came from several d