Bomb damages Colombia's Cano Limon crude pipeline
The attack, which took in Las Bancas in eastern Arauquita municipality, did not contaminate any water sources, the company said in a statement. It did cause a small spill which was contained in the crater left by the explosion.
The statement did not specify when the attack took place or whether the 485-mile (780-km) pipeline was pumping at the time.
The Cano Limon was kept offline for most of 2018 because of more than 80 bombings.
Though Ecopetrol did not name those responsible for the bombing, the leftist National Liberation Army (ELN) rebel group, considered a terrorist organization by the United States and the European Union, regularly attacks oil infrastructure.