(Vancouver, WA)  --  An investigation is ongoing in Vancouver, Washington, where police say someone tossed a bottle bomb out their car window, landing a 13-year-old girl in the hospital.  Police say the girl was walking a dog near Fort Vancouver Way and East 26th Avenue Saturday night when she came across the bottle on the ground and thought it was just litter.  Police say she picked the bottle up to throw it away and it exploded, injuring her.  Witnesses tell police they saw someone toss the bottle out the window of a green SUV earlier.  Police are still searching for the suspect.  The girl is expected to make a full recovery.