Colombian Red Cross said on Saturday that at least 127 people were killed in a landslide in southern Colombia's Mocoa city.

The tragedy occurred on Friday night when heavy rains caused rivers to overflow, devastating several neighbourhoods in the provincial capital of Mocoa, Xinhua news agency reported.

Colombian President Juan Manuel Santos arrived in Mocoa on Saturday morning and ordered immediate assistance to all the affected population.

He said he would send several aircrafts to deliver humanitarian aid for those affected in Mocoa, a city located in the middle of the jungle of the Amazon region.

Santos said earlier that at least 112 people were killed in the landslide in Mocoa.

The country's fire department said earlier on Saturday that 102 people were killed and 185 wounded in the landslide.