Venezuela has accused US President Donald Trump of making a "colonialist threat" after he said the airspace around the country should be considered closed. The country's foreign ministry called Trump's comments "another extravagant, illegal and unjustified aggression against the Venezuelan people". The US does not legally have the authority to close another country's airspace, but Trump's online post could lead to travel uncertainty and deter airlines from operating there. The US has been building its military presence in the Caribbean, which officials say is to combat drug smuggling. Venezuela's President Nicolás Maduro has dismissed US claims of drug trafficking as an attempt to oust him.