BRUSSELS — Iberia and TAP Air Portugal were banned from operating in Venezuela Thursday as tensions rise between the South American country and the United States.

Venezuela’s National Institute of Civil Aviation (INAC) announced the “revocation of the concession” to operate in the country on Instagram, accusing the airlines of “joining in the acts of state terrorism promoted by the government of the U.S.”

The decision was a response to the suspension of operations in Venezuela by Iberia and TAP, as well as Turkish Airlines, Colombia’s Avianca, Chile’s LATAM Airlines, and Brazil’s Gol, due to safety concerns as of Nov. 22.

The carriers suspended operations after the U.S. Federal Aviation Administration warned on Nov. 21 of a “worsening security situation and heightened military activity” in Venezuela. The Spanish authority AESA joined the warning on Nov. 24.

U.S. President Donald Trump has moved forces close to Venezuela and there is growing worry that the U.S. may attack.

The day after Spain’s warning, Venezuela’s INAC requested that the six airlines resume operations within 48 hours, threatening to suspend their traffic rights if they did not comply. They did not, so the Venezuelan authority followed through by banning them.

“Iberia cannot operate in areas where there is a high safety risk. This is currently the case in Venezuela,” the Spanish airline, which is part of the IAG Group, told POLITICO. “Iberia hopes to resume flights to Venezuela as soon as possible, once full safety conditions are in place.”