Authorities in Guyana and the U.S. Embassy in the South American nation have warned of an unspecified "threat" to Caribbean Airlines flights out of the country.
Extra security measures were put in place at Cheddi Jagan International Airport outside the capital Georgetown, but the Trinidad and Tobago-based airline was operating normally out of Guyana on Monday with a flight to New York departing at dawn.
"The officials assessed the threat and put in place a number of measures to prevent any untoward occurrence," the airport authority said in a statement late Sunday. "A heightened security posture will remain in place over a number of days until such time as the threat is no longer deemed valid."
The U.S. Embassy in Guyana, a former British colony on the northeast shoulder of South America, warned citizens not to use Caribbean Airlines until the middle of the week.
"Out of an abundance of caution, the embassy advises all U.S. citizens in Guyana traveling on Caribbean Airlines to the United States from Monday, Feb. 10 through Wednesday, Feb. 12, 2014, to make alternate travel arrangements," it said.
Caribbean Airlines said its planes were leaving normally, but extra security was in place.