The US Embassy in Guyana has warned that it has received "unconfirmed threat information" about a regional airline's flights to the United States and urged Americans to avoid using the carrier.
The terse message about the Caribbean Airlines flights is unusual for being so specific about a potential threat.
It was posted Sunday on the embassy's website.
It advised all US citizens in Guyana to make alternate travel arrangements up to Wednesday if they were planning on travelling home on flights with Caribbean Airlines.
The airline's representative for Guyana, Carl Stuart, said the company has elevated "our level of security involving the police, the military and other agencies."
"We have been on this since Friday," he told The Associated Press.
"We are on top of this and flights will continue as normal, but we are taking no chances."
In 2007, a former member of Guyana's parliament and a naturalised US citizen from Guyana were among four people convicted of participating in a failed plot by a small group of militant Muslims to firebomb John F. Kennedy International Airport in New York.
