Ecuador's state oil company says it has resumed pumping through the country's main pipeline four days after it was damaged by a landslide. But a spill caused by the slide polluted drinking water for a city of about 80,000 people.

Petroecuador issued a statement Tuesday saying pumping resumed at 9:15 a.m. (1415 GMT).

A Friday landslide damaged the trans-Ecuador pipeline, causing the spill of some 420,000 gallons (1.6 million liters) of crude oil. Some entered the Coca river, a tributary of the Amazon that also flows through Peru and Brazil.

Environmental activist Alexandra Almeida says the spill left the regional capital city of Coca without drinking water. The oil company is distributing bottled water to residents.

Ecuador has warned Brazil and Peru of possible river pollution because of the spill.