The administration of Colombian President Gustavo Petro has announced it is suspending a ceasefire agreement with a rebel group accused of killing four Indigenous people in a recent attack.

The government said on Monday that it will resume attacks on the Estado Mayor Central (EMC) group, a splinter of the now-disbanded Revolutionary Armed Forces of Colombia (FARC), once the country’s largest rebel group.

The temporary suspension applies to the provinces of Caqueta, Putumayo, Guaviare and Meta. The ceasefire with the EMC will remain in effect in other regions.

“If a bilateral ceasefire is not effective in protecting the life and integrity of the entire population in certain territories, then there is no point in persisting,” a government statement said.