(Reuters) – Two people were killed after floods triggered a landslide in North Carolina, as Alberto was downgraded to a post-tropical cyclone with diminished rainfall by the U.S. National Hurricane Center (NHC) on Thursday.

Rescue workers found two bodies after being alerted late Wednesday that the landslide had destroyed a home in Boone, North Carolina, in the heart of the Blue Ridge Mountains, said Jeff Virginia, spokesman for Watauga County Emergency Management.

Local media reported that heavy rains caused the landslide which triggered a gas explosion.

Video images posted to Twitter by the Boone Police Department showed an apparently charred home reduced to rubble.

Alberto has becomes a post-tropical cyclone as it attempts to exit northeastern lower Michigan, and a heavy rainfall threat is fading near its center, the U.S. National Hurricane Center (NHC) said in its latest advisory.

The system is located about 20 miles (30 km) west south-west of Alpena, Michigan with maximum sustained winds of 30 miles per hour (45 km/h), the weather forecaster said.

“Flash flood watches remain in effect for the western Carolinas, northwest Virginia, and far eastern west Virginia,” the NHC added.

(Reporting by Arpan Varghese and Eileen Soreng in Bengaluru, and Barbara Goldberg in New York; Editing by Toby Chopra and Bernadette Baum)