Tourist arrivals to Cuba plunged 23.6 percent on the year in July, official data showed on Wednesday, confirming the blow dealt to the sector by the Trump administration's tightening of U.S. restrictions on travel to the Caribbean island.

Data from the Statistics Office had already shown a 20 percent drop in arrivals in June, after Washington that same month banned cruises to Cuba and made it harder for U.S. citizens to get an exemption from the ban on travel there.

The sustained decline reverses a boom in arrivals and therefore the broader tourism industry in recent years following the U.S.-Cuban detente under former U.S. President Barack Obama that President Donald Trump is now unraveling.