Donald Trump has issued a chilling five-word threat to another South American leader in the wake of US forces seizing a Venezuelan oil tanker.

The President has told reporters President of Colombia Gustavo Petro must "wise up" or "he'll be next". He said: "I hope he's listening: He's going to be next". He accused Colombia of producing cocaine.

Petro has denied his government’s involvement in the drug trade and has harshly criticised the U.S. boat strikes, calling them a "massacre".

It comes after the Colombian president warned Donald Trump last week that he risked "waking the jaguar" after Trump said countries producing drugs destined for the US could be "subject to attack".

When asked about whether military action would be confined to Venezuela, Trump said last week: "I hear Colombia , the country of Colombia, is making cocaine," before adding, "anybody that's doing that and selling it into our country is subject to attack."