More than 50 people have been killed in a landslide in Antioquia province in north-west Colombia, officials say, the BBC reports.
President Juan Manuel Santos said the authorities do not know how many people are still missing.
Heavy rains caused the river Liboriana, in the town of Salgar, to burst its banks, triggering the landslide.
Much of the village of Santa Margarita, south-west of the provincial capital, Medellin, was swept away when the disaster hit early on Monday.
Rescue teams and residents have got together to dig through rouble in the hope of finding survivors.
After visiting the scene of the disaster, Mr Santos declared a state of emergency and promised to rebuild the houses.
The tragedy in Salgar appeared to be the single deadliest event since a 1999 earthquake in the city of Armenia that left hundreds dead.