Chinese President Xi Jinping on Monday condemned what he called "unilateral hegemonic bullying" in his first public comments since the U.S. attack on Venezuela.

Speaking after a meeting with Irish Prime Minister Micheal Martin in Beijing, Xi did not mention the U.S. by name, but appeared to be referencing the weekend assault on Venezuela and the seizure of the country's President Nicolas Maduro.

"The world today is fraught with turmoil, and unilateral hegemonic bullying is severely impacting the international order," Xi said, according to remarks published by the Chinese Foreign Ministry.

"All countries should respect the development paths chosen independently by the people of other countries, abide by international law and the purposes and principles of the U.N. Charter, with major powers taking the lead," Xi added.

ABC News' Karson Yiu

President Donald Trump, who has said the operation against Venezuelan President Nicolas Maduro should serve as a warning to the rest of the world, doubled down on his threats, implying that Colombian President Gustavo Petro could face U.S. action soon.

“Colombia is very sick too, run by a sick man who likes making cocaine and selling it to the United States. And he's not going to be doing it very long. Let me tell you,” Trump claimed while speaking to reporters on Sunday.

Earlier on Sunday, Petro released a statement on the operation and Trump's previous comments about him, saying, "I deeply reject Trump speaking without knowing; my name does not appear in the judicial files on drug trafficking over 50 years, neither from before nor from the present."

"Stop slandering me, Mr. Trump. That’s not how you threaten a Latin American president who emerged from the armed struggle and then from the people’s struggle for Peace in Colombia," he added.

Reporters asked Trump if the U.S. has a similar plan to deal with Cuba as they did for Venezuela, to which he said that Cuba only survived because of Venezuela.

“Now, they won't have that money coming in. They won't have the income coming in. You know, a lot of Cubans were killed yesterday, you know that a lot of Cubans were killed,” Trump said.

Trump said those Cubans were trying to protect Maduro.

Later, the president said that Cuba is “ready to fall.”

“Cuba looks like it's ready to fall. I don't know how they -- if they're going to hold out, but Cuba now has no income,” Trump said. “They got all of their income from Venezuela, from the Venezuelan oil. They're not getting any of it. And Cuba literally is ready to fall. And you have a lot of great Cuban Americans that are going to be very happy about this.”

Asked again if the U.S. is considering action in Cuba, the president said he doesn’t think there needs to be any because “it looks like it’s going down.”

-ABC News' Meghan Mistry and Hannah Demissie

President Donald Trump told reporters on Sunday, “we’re in charge” of Venezuela, doubling down on his claim Saturday that the U.S. will “run” the country.

Trump said that he has not spoken to Delcy Rodriguez, Maduro’s vice president, who was sworn in as interim leader. Asked if he wants to speak to her, the president said, "At the right time, I will."

Trump also said that Rodriguez is cooperating with the U.S., a claim he made Saturday, which she appeared to dispute in an address to Venezuelans, when she called for Maduro’s immediate release.

Later, the president was asked about comments he made to The Atlantic, where he said that if Rodriguez "doesn’t do what’s right, she is going to pay a very big price, probably bigger than Maduro."

Asked what he needs from Rodriguez, Trump called for “total access” to the country’s oil reserves.

“Total access. We need total access. We need access to the oil and to other things in their country that allow us to rebuild their country,” he said.

-ABC News' Meghan Mistry and Hannah Demissie

The Cuban Communist Party released a statement on Sunday, claiming at least 32 Cuban nationals were killed during the United States' operation in Venezuela.

The party said that the citizens were killed in "combat actions" while "fulfilling missions representing the Revolutionary Armed Forces and the Ministry of the Interior, at the request of counterpart bodies of the South American country."

-ABC News' Will Gretsky

Secretary of State Marco Rubio said Sunday the U.S. was in charge of "the direction" of the situation in Venezuela after U.S. forces arrested and deposed Venezuelan President Nicolás Maduro.

"President Trump was pretty clear yesterday. He said the United States is going to run Venezuela. Under what legal authority?" ABC News' "This Week" anchor George Stephanopoulos asked.

"Well, first of all, what's going to happen here is that we have a quarantine on their oil. That means their economy will not be able to move forward until the conditions that are in the national interest of the United States and the interests of the Venezuelan people are met," Rubio said.

But pressed on whether the U.S. was in charge of the country right now, Rubio said that what the U.S. was "running" was the direction of the situation.

"What we are running is the direction that this is going to move moving forward. And that is we have leverage," Rubio said.

"The leverage that we have here is the leverage of the quarantine. So that is a Department of War operation conducting, in some cases, law enforcement functions with the Coast Guard on the seizure of these boats," Rubio said.

Rubio added that Maduro was someone the U.S. "simply couldn't work with," and said that the administration was not recognizing Venezuelan Vice President Delcy Rodríguez as the current legitimate leader.

"We don't believe that this regime in place is legitimate via an election," Rubio said.

"Ultimately, legitimacy for their system of government will come about through a period of transition and real elections, which they have not had," he added.

-ABC News Nicholas Kerr