Nine people, including two children, went missing over the weekend in the torrential rains in Colombia, where the year's second rainy season has left at least 25 people dead, 13 others missing and about 70,000 affected, the emergency management office said.

The worst situation was reported in Carmen de Atrato, a rural town in the northwestern jungle province of Choco, where a mudslide buried five people traveling on motorcycles.

The mudslide hit the highway that connects Medellin, the capital of the neighboring province of Antioquia, to Quibdo, the capital of Choco.

Rescue workers have only found the travelers' belongings so far, Carmen de Atrato Mayor Rafael Montoya told Caracol Television.

The two missing children, ages 4 and 6, were aboard a boat that capsized in the raging waters of the Carare River near Cimitarra, a rural town in the northeastern province of Santander.

The boat was also carrying 10 adults, all of whom survived, regional police commander Col. Mario Aurelio Pedroza told reporters in Bucaramanga, the capital of Santander.

"The children have not been found," Pedroza said.

Two people are missing following a mudslide in Villamaria, a rural town in the northwestern province of Caldas, fire chief Jairo Alarcon told Caracol Radio.

The mudslide buried a dwelling belonging to some peasants, the fire chief said.

Colombia entered the second rainy season of the year in mid-September and it will not end until December.

A total of 117 dwellings have been destroyed and 10,436 others have been damaged by the heavy rains, the emergency management office said, adding that 33 people have been injured in the downpours.