FORT WORTH, Texas >> American Airlines is indefinitely suspending flights to Venezuela as political turmoil and unrest continues to grip the country.

Airline spokeswoman Martha Pantin said today that the airline will try to resume service when conditions are right but has no timetable for doing so.

On March 15, American announced it was suspending its two daily flights from Miami to Caracas and one from Miami to Maracaibo through April 1. The airline acted after its pilots’ union told members not to operate flights to Venezuela because of safety concerns.

American was the last U.S. airline flying to Venezuela.

The United States was the first nation to recognize opposition leader Juan Guaido as interim president, heightening tension with the regime of President Nicolas Maduro. U.S. diplomats left the country this month.