The charges announced by U.S. authorities on Wednesday intensified tensions between Washington and Havana and prompted criticism from Beijing, which reaffirmed support for Cuba’s sovereignty and opposition to foreign interference.

“The U.S. side should stop brandishing the sanctions stick and the judicial stick against Cuba and stop threatening force at every turn,” Chinese foreign ministry spokesman Guo Jiakun told a regular press briefing in Beijing.

“China firmly supports Cuba in safeguarding its national sovereignty and national dignity and opposes external interference,” Guo said.

The indictment against Castro, 94, includes charges of conspiracy to kill Americans and destruction of aircraft linked to the 1996 shooting down of two planes operated by anti-Castro activists, an incident that killed four people.

Castro, the younger brother of late Cuban revolutionary leader Fidel Castro, led Cuba from 2008 until 2018 after decades as one of the country’s most powerful political figures.

U.S. President Donald Trump described the indictment as a “very big moment” on Wednesday but downplayed suggestions of immediate action against the Cuban government.

The development comes as Cuba faces a prolonged economic crisis marked by fuel shortages, inflation and declining foreign currency reserves, conditions Havana has blamed in part on longstanding U.S. sanctions and restrictions.

China has maintained close political and economic ties with Cuba and has consistently criticized Washington’s sanctions policy toward the island nation.