Chinese contractors suspended work on three hydropower projects in view of security concerns after Tuesday's attack
The landslide, which was caused by heavy rains, occurred early on Sunday in a rural area of Rosas municipality, the agency said in a statement.
On Sunday evening an agency spokesman said the death toll had risen from the initial figure of 14.
Five people were hospitalized and eight houses were destroyed. A portion of the Pan-American Highway was also blocked by the landslide.
President Ivan Duque will visit the area on Sunday evening with the housing and transport ministers to meet with relief officials, his office said in a statement.
Landslides are common in mountainous Colombia, especially during rainy season and in areas where precarious informal housing and narrow roadways are constructed on deforested Andean hillsides.