HARWICH – The busy Memorial Day weekend started with a serious crash in Harwich Saturday morning. Two vehicle were involved in the crash on Route 6 west of exit 10. One of the vehicles rolled over. Officials completely shut down Route 6 between exits 9 and 10 for about 45 minutes while the scene was worked causing a significant backup of traffic. Two people were taken to Cape Cod Hospital via Harwich and Dennis ambulances. The crash is under investigation by State Police.