The emergency department at the hospital in Lunenburg will be closed for most of the weekend. The ER will not be staffed beginning tonight at 7:30pm. South Shore Health says it's due to the unavailability of a doctor. It will reopen on Sunday morning at 7:30am. Residents that live near the hospital and need urgent medical attention should dial 9-1-1 or go to the South Shore Regional Hospital in Bridgewater.