Clergy members are mourning the death of a well-known pastor who served the Roman Catholic community on the South Shore. Father Joseph Christensen passed away suddenly Tuesday night while attending a convention in Edmonton, Alberta. A spokeswoman for the Archdiocese of Halifax-Yarmouth says Christensen had been battling serious heart problems. He was the priest at Saint Joseph's Church in Bridgewater, Saint Norbert's Mission in Lunenburg and St. Matthew's Mission in Elmwood. He had been stationed in the area since 2008. Christensen was 68 years old.