US military jets and drones tracked near Cuba as tensions continue

The US military has been publicly broadcasting the location of military surveillance flights near Cuba on plane-tracking websites, as Washington continues to exert pressure on the island's communist leadership.

Leaving flight transponders on "is likely deliberate", said UK drone expert Dr Steve Wright, with the US intending to send "a clear message it has eyes in the sky to maintain the squeeze".

BBC Verify analysis of data from flight-tracking website Flightradar24 shows at least five US Navy P-8A Poseidon surveillance aircraft and three MQ-4C Triton surveillance drones have been operating in the Caribbean near Cuba since 11 May. Some aircraft have flown as close as 50 miles (80km) from the island.

Flight-tracking data cannot give a complete picture of US activity off Cuba as military aircraft do not always broadcast their positions but share their location for portions of a flight.

The deployment of these aircraft comes as US-Cuba tensions have risen significantly in recent months, after Washington imposed an effective oil blockade on the Caribbean nation.

These accusations were followed by US Secretary of State Marco Rubio offering a "new relationship" with the Cuban people on Wednesday.

Speaking in Spanish on the anniversary of Cuba's independence from the US in a direct address to the island's population, Rubio blamed the island's "unimaginable hardships" on its communist leadership - and not the US fuel blockade.

Experts told BBC Verify the public nature of these surveillance flights indicates the US is seeking to enforce the blockade and apply pressure on the Cuban government as well as deterring its allies like Venezuela from attempting to get energy shipments to the island.

The resulting fuel crisis has led to major power blackouts and triggered protests in Cuba. President Donald Trump has also put Cuba under significant pressure to "make a deal" and threatened its communist regime that the US could intervene like it did in Venezuela earlier this year when it captured President Nicolás Maduro.

What the flight-tracking data shows

BBC Verify has tracked several flights by US Navy P-8 Poseidon surveillance jets including one on 11 May when the aircraft got within 50 miles (80km) of southern Cuba, according to Flightradar24 data. The P-8 continued to operate into the following day, when it was seen flying to the north of Cuba's capital Havana before returning to its base in Jacksonville, Florida.

On 15 May, two US MQ-4C Triton surveillance drones also operated off the coast of southern Cuba, with tracking showing them operating along a route similar to one previously flown by a Poseidon.

Mark Cancian, a retired US Marine Corps colonel and senior adviser at the Center for Strategic and International Studies (CSIS), told BBC Verify the recurrent flight paths of the surveillance aircraft "indicate an intention to spot ship arrivals from the south, primarily, and secondarily from the north".

"None of the flights are over land, so this is not some preparation for invasion," he said. Cancian added he doubts these flights are "routine", given the number of P-8s and MQ-4C Tritons the US has at its disposal are "limited".

BBC Verify also examined US military aircraft activity near Cuba between 1 and 7 February, which saw only one P-8 fly in the vicinity of Cuba and no comparable MQ-4C Triton activity near the island. However, a US Air Force RC-135V Rivet Joint reconnaissance aircraft did conduct two passes of the island over the period.

Drone expert Steve Wright told BBC Verify the drone surveillance flights "are most likely part of a US agenda to deter attempts by Venezuela to breach the oil blockade and ship fuel into Cuba".

Analysts from defence intelligence firm Janes offered a similar assessment, as well as saying there had been a "general increase in US intelligence, surveillance, and reconnaissance sorties" since February.

"The fact that these flights are visible through open-source tracking tools suggests they are intended to deter attempts to break the oil blockade and apply pressure on the Cuban government," Janes told BBC Verify.