(Springfield, OR)  --  Police say they've arrested a pair of car theft suspects after they allegedly tried to hide from officers on a LTD bus.  Springfield Police says officers boarded the bus and arrested Keven Allen Grieve and Ryan Lee Hicks yesterday after a Eugene Police officer saw them get onto the bus following a police chase.  Police say someone was warming up their car in their driveway yesterday morning when the two got into the car and took off.  Police pursued the vehicle, but they got away and eventually ditched the car and took off on foot before getting onto the bus where they were arrested.