Hanoi:  Sixty-one people were killed and dozens were missing in northern Vietnam following heavy rain and flash floods brought by tropical storm Kammuri, officials said on Saturday.

The mountainous province of Lao Cai, bordering China, was the most seriously hit area with 31 people killed by landslides and flash floods on Friday night and Saturday morning.

"It is a very ugly scene up here with numerous villages completely isolated after local roads were washed away by the floods and landslides," a spokesman for Lao Cai's Storm and Flood Prevention Centre told reporters by telephone.

He said the army had been leading rescue work but 32 people were still missing.