ELN conducts military drills, orders civilians indoors, as Trump warns drug-producing nations face potential attack.

Colombia’s largest remaining rebel force has told civilians living under its authority to stay at home for three days while it stages military drills in response to burgeoning United States threats.

The National Liberation Army (ELN), a left-wing rebel group, ordered the lockdown on Friday, instructing residents to keep off major routes and rivers from Sunday morning as fighters conduct what the group describes as preparations to defend the country against “imperialist intervention”.

The announcement follows warnings from President Donald Trump that nations manufacturing and exporting cocaine to the US could face military strikes or even land attacks.

“It is necessary for civilians not to mix with fighters to avoid accidents,” the ELN said.

Colombia’s Defence Minister Pedro Sanchez rejected the rebel directive as “nothing more than criminal coercion”, pledging that government troops would maintain presence “in every mountain, every jungle, every river”.

The move underscores a deepening confrontation between Washington and Bogota as Trump escalates rhetoric against Colombian President Gustavo Petro.

Earlier this week, Trump told business executives that Petro had “better wise up, or he’ll be next”, citing cocaine production as justification for potential action, and alluding to the US military build-up near Venezuela amid threats to remove its President Nicolas Maduro.

In recent days, the Trump administration has imposed new sanctions on Venezuela, targeting three nephews of President Nicolas Maduro’s wife, Cilia Flores, as well as six crude oil tankers and shipping companies linked to them, as Washington steps up pressure on Caracas, following the US seizure of a Venezuelan oil tanker.

Petro has responded to Trump’s actions, including sanctioning the Colombian president, with equal defiance, warning Trump earlier this month against “waking the jaguar” and insisting any assault on Colombian territory would amount to a declaration of war.

The left-wing president has invited his US counterpart to witness laboratory demolitions firsthand, claiming his administration destroys drug facilities every 40 minutes. In late November, the government hailed what it said was its largest cocaine bust in a decade.

The rebel group, ELN, which fields roughly 5,800 fighters, maintains control over significant drug-producing areas, including the Catatumbo region along the Venezuelan frontier.

Al Jazeera correspondent Teresa Bo, who visited ELN-held territory in November, found the group exercising unchallenged authority, with fighters openly displaying banners declaring “Total peace is a failure” and no government soldiers visible.

Commander Ricardo, a senior figure interviewed during that visit, suggested the rebels might join wider resistance should Trump attack Venezuela. Such an intervention could provoke an armed response across Latin America, he warned, describing US actions as violations of regional self-determination.

The organisation has attempted peace negotiations with Colombia’s last five governments without success.

Discussions with Petro’s administration collapsed after the ELN launched a January assault in Catatumbo that killed more than 100 people and forced thousands from their homes.

Despite claiming ideological motivation, the group derives substantial income from narcotics trafficking, competing with former FARC fighters who refused to disarm under a 2016 peace settlement for control of coca cultivation zones and smuggling corridors.

Relations between Colombia and the US have deteriorated sharply since Trump returned to office.

Washington has imposed personal sanctions on Petro, cancelled his visa after he joined a pro-Palestinian demonstration in New York, and removed Colombia from its list of reliable counter-narcotics partners.

Meanwhile, Trump has deployed the nation’s largest aircraft carrier and nearly 15,000 troops to the Caribbean and has ordered more than 20 military strikes in recent months against alleged drug trafficking vessels in the Caribbean and off Latin America’s Pacific coast, killing more than 80 people.

Human rights groups, some US Democrats, and several Latin American countries have condemned the attacks as unlawful extrajudicial killings of civilians.