AP interview: Colombia to denounce Maduro at UN meeting Colombia's leader says "brutality" of Nicolás Maduro must end and that any aggression by Venezuela's armed forces would immediately trigger a regional response.

BOGOTA, Colombia -- Colombia's president compared Nicolás Maduro to Serbian war criminal Slobodan Milosevic as he goes on a diplomatic offensive to corral the Venezuelan socialist, warning that he would be making a "stupid" mistake if he were to attack his U.S.-backed neighbor.

Ivan Duque made the comments in an interview Saturday with The Associated Press before traveling to New York where he is expected to condemn Maduro before the United Nations General Assembly as an abusive autocrat. Duque believes Maduro is not only responsible for the country's humanitarian catastrophe but is also now a threat to regional stability for his alleged harboring of Colombian rebels.

"The brutality of Nicolás Maduro is comparable to Slobodan Milosevic," said Duque, who has called on the International Criminal Court to investigate Maduro for human rights abuses. "It must come to an end."

While Duque refused to rule out a military strike against the Marxist rebels he claims are hiding out across the border, he said any aggression by Venezuela's armed forces would immediately trigger a regional response that could include additional sanctions and diplomatic actions.

"If they consider doing something so stupid, they know what the consequences will be," said Duque.

Duque has ratcheted up pressure against Maduro in recent weeks after a small band of dissident leftist rebels decided to break with Colombia's historic peace process and take up arms against the state again, contending that the government has betrayed the accord aimed at ending over five decades of bloodshed.

At the U.N., the young Colombian leader is expected to accuse Maduro of breaking a Security Council resolution passed after the Sept. 11, 2001 terrorist attacks by offering the rebels refuge.

The embattled Venezuelan president has repeatedly denied those accusation, and although he won't attend this year's General Assembly, his envoys are likely to levy similar charges against Duque, accusing him of failing to act against illegal armed groups plotting attacks against his government from Colombia.

"The Colombian oligarchy wants to lay the ground for an armed aggression against Venezuela," Communications Minister Jorge Rodriguez said recently.

The growing tensions along the border have potentially dangerous and wide-reaching geopolitical implications involving the interests of Russia, China and the U.S.

At the U.S.' urging, hemispheric allies recently dusted off a mutual defense treaty from the Cold War that requires the 19 signatory nations to come to the rescue of one another in the event of an external threat.

Foreign ministers from most of the 1947 Rio Treaty nations are scheduled to meet Monday to weigh multilateral sanctions. Though the accord permits a joint military response, Duque insisted that is not the preferred course of action and that under no circumstances would Colombian troops be provoked.

"It's important that Duque at the U.N. will have this forum to present evidence about Colombian armed groups' activity in Venezuela, and it's also a chance to gauge world leaders' comfort levels with further ratcheting up pressure on Venezuela," said Adam Isacson, a defense analyst at the Washington Office on Latin America.

"But with Russia, China, and others opposing, it will be impossible to achieve consensus necessary to treat Venezuela, under the U.N. Charter, as a threat to peace and security," Isacson said.

The Venezuela crisis is also stretching budgets across South America as over four million people flee an economic crisis worse than the U.S. Great Depression. The massive flight comes as Colombia, which has absorbed the largest number of migrants, is also grappling with skyrocketing coca production and implementation of the fragile and contentious peace accord with the Revolutionary Armed Forces of Colombia.

Despite the fiscal pressure on education and health budgets, Duque defended his open door policy, arguing that it allows Colombia to more effectively combat illnesses like measles, which it had previously eliminated but re-emerged with the arrival of more than 1.4 million Venezuelan migrants in recent years.

Closing the border will not curtail the exodus but rather force migrants to move on dangerous dirt trails that crisscross the porous 1,370-mile (2,200-kilometer) border between the two countries.

"The right policy is the one we have been embracing," said Duque, contrasting Colombia's response to the barriers recently erected in Ecuador and Peru. "If they decide to close the borders people will pass anyway but they will pass illegally and the control, for example of illnesses, will be more complex."

Duque, 43, rose from near obscurity within a spate of a few years with the help of former Colombian President Álvaro Uribe, the peace deal's chief critic. He served as a senator before winning the presidency last year on a law and order platform promising to reform key aspects of the accord.

Thus far, he has largely failed to force through any changes. But he pointed to recent legislation barring governments from granting amnesty to rebels involved in drug trafficking as a step forward that will prevent a repeat of the impunity that he says was baked into the 2016 peace accord.

He also said his government had expended 8-fold the number of regional development plans left by his predecessor, Nobel Peace Prize winner Juan Manuel Santos, while implementing a program that allows private businesses to direct their tax payments to fund productive projects in formerly war-torn areas.

"We're not doing politics with peace, but we have a peace policy," said Duque.

At the same time, the murder of hundreds of leftist activists in rural areas have a cast a dark shadow over the peace process. While Duque has boosted funding to investigate the killings, which he claims have fallen since taking office, he was greeted during a June visit to London by protesters shouting "killer!" So far this year, seven candidates running in next month's regional elections have been killed — surpassing the levels seen in the 2015 races.

"We know that we have to put more control, that we have to protect the lives of the candidates," he said. "But sometimes when we have local elections the illegal armed groups are the ones that try to threaten candidates in the zones where there is coca production or illegal mining so that they keep on controlling the illegal economies. We know that pattern and that's why we're working articulately with all of the military and police forces."

Since being sworn into office last year, Duque's popularity levels have steadily plummeted as he has struggled to find his voice as chief of state. One recent poll put his approval rating at just 29 percent.

Though coca production has leveled off under his administration, after surging for several straight years, it remains near a record high. Vast rural stretches of Colombia are still dominated by drug lords and illegal armed groups. Many Colombians believe their nation's civil conflict never ended and fear a new era of bloodshed.

Duque said he is moving quickly to bring back aerial eradication of coca crops — a linchpin of the U.S.-backed war on drugs for two decades that Santos suspended in 2015, citing health concerns — but refused to put a deadline for the flights to resume. In any case, he downplayed the effectiveness of what he called "precision spraying," saying instead that it's a valuable tool in areas where land mines and the presence of armed groups make it unsafe for the military and manual coca eradicators to go in.

"There's not a silver bullet," he said of the fight against illegal crops. "There's not only one solution. It's a combination of instruments."

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