At least 138 people have been killed and 570 injured after a magnitude-7.4 quake struck Cali

A curfew has been imposed in the Colombian city of Cali following a devastating earthquake, as the nationwide death toll rose to 138, with 570 others injured.

Colombian President Abelardo de la Espriella declared a national emergency, saying the government would commit all necessary resources to helping victims and rebuilding affected areas.

The magnitude-7.4 earthquake struck on Monday, with its epicenter in western Colombia, affecting the departments of Valle del Cauca, Caldas, Choco, and Risaralda.

Harrowing footage shows people fleeing shaking and collapsing buildings. A disturbing video filmed in Cali appears to show four people being crushed by a falling balcony as they fled a clinic.