• U.S. officials have warned that Russia and China are expanding espionage activities in Cuba, including a potential signals intelligence facility near the U.S. mainland.
  • The developments heighten geopolitical tensions in the Western Hemisphere, with implications for U.S. national security and regional stability.
  • The Wall Street Journal reported the warnings, citing unnamed U.S. officials familiar with intelligence assessments.

The Wall Street Journal reported Thursday that U.S. officials are sounding alarms over increasing Russian and Chinese intelligence-gathering operations in Cuba, including discussions about establishing a listening post roughly 100 miles off the coast of Florida. According to people familiar with the matter, the facility could be used to intercept communications across the southeastern United States, marking a significant escalation in great-power competition in the region.

The warnings come amid a broader pattern of reported Chinese efforts to explore signals intelligence (SIGINT) bases in Cuba over the past decade. U.S. agencies have previously flagged such activities, but the latest assessments suggest renewed momentum, potentially tied to deepening economic ties between Cuba and its foreign partners. A spokesperson for the National Security Council declined to comment on the specifics, but said the U.S. is “monitoring the situation closely” and will take appropriate measures to safeguard national security.

“A Cuban-based facility capable of monitoring U.S. military and civilian communications would be a game-changer,” said a former U.S. intelligence official briefed on the matter, speaking on condition of anonymity. “It’s not just about spying—it’s about strategic leverage.”

The implications extend beyond intelligence. The reports could reignite debates over U.S. sanctions on Cuba and prompt calls for tougher technology export controls. Defense and telecom sectors may face heightened scrutiny, though direct market reactions have been muted so far. Analysts caution that while the threat is serious, the feasibility and scale of such a facility remain uncertain, and some U.S. officials have acknowledged gaps in intelligence.

Correction: An earlier version of this article misstated the distance from Florida to Cuba. The correct distance is approximately 100 miles.