Four people were injured in a two-vehicle crash in Delaware County Monday morning. The Iowa State Patrol reports the accident happened at the intersection of 180th Avenue and 150th Street at around 7:45 a.m. when the driver of a Chevy Equinox failed to yield to traffic from a stop sign. The Equinox collided with an eastbound Ford Explorer, causing the explorer to roll and enter the ditch. The state patrol reports the driver of the Explorer was not wearing a seatbelt and was injured. A 12-year-old passenger in the Explorer was also injured.