Though Trump's comments appeared to be a new allegation, it wasn't clear whether he meant Cuba was behind the attacks or merely shared the onus because it failed to keep Americans safe on its soil.
"I think Cuba knew about it". And its a very unusual attack, as you know.
Asked by reporters whether he agreed that the Cuban government is capable of halting the mystery attacks, Trump said: "I do believe Cuba is responsible".
Last week, White House Chief of Staff John Kelly said the Cuban government "could stop the attacks on our diplomats", but he declined to say whether Trump is considering fully shuttering the embassy.
The president did not elaborate. According to the United States, these actions seek to guarantee the safety of USA citizens, as well as responding to Cuba's lack of action to protect the officials. The Cuban government has denied having anything to do with the injuries.
The accusation comes after both the USA and Cuba have removed almost 60 percent of their officials from Havana and Washington respectively over the past few weeks following the news of 22 US officials being "medically confirmed" to have suffered some injury from apparent high-pitched sounds.
Trump did not offer any further details. In late September, the State Department made a decision to withdraw more than half members from the U.S. Embassy in Havana, halted the issuance of visas to Cuba, issued a travel warning to the U.S. citizens and expelled 15 Cuban diplomats from Washington.
The US has not explicitly accused any actor of perpetrating the attacks, which in some cases involved mysterious, blaring sounds that led to investigators to consider whether a sonic weapon was involved.