REDMOND, OR -- Early Saturday afternoon, two Madras residents were killed in a collision on Highway 97 at the O'Neil Highway.  Oregon State Police report a 2004 Honda Odyssey was entering Highway 97 when it was struck by a tractor-trailer rig. 53-year-old Robert Gregg and his 46-year-old passenger, Antonia Romero, were both killed.  The truck driver was not injured. The highway was partially closed for several hours.