The plot against the JFK airport allegedly has been linked to Jamaat Al Muslimeen, described by justice officials as an international network of Islamists from the US, Guyana and Trinidad.
Among the three suspects arrested since Friday was Russell Defreitas, a US citizen and native of Guyana who was arrested in New York.
Authorities said he was a former airport employee who conducted surveillance for the group, using his knowledge of the site to identify targets and escape routes.
|Targets in the airport plot included terminal|
buildings, aircraft and fuel tanks [AFP]
"Any time you hit Kennedy, it is the most hurtful thing to the United States," Defreitas said in one recorded conversation. "To hit John F Kennedy, wow ... they love John F Kennedy like he's the man ... if you hit that, this whole country will be mourning. You can kill the man twice."
Authorities said two suspects were in custody in Trinidad and Tobago: Abdul Kadir, a citizen of Guyana and former member of its parliament, and Kareem Ibrahim, a citizen of Trinidad and Tobago. Their extradition was being sought, officials said.
Officials in Trinidad and Tobago said one of the suspects arrested there was caught on a flight preparing to take off for Venezuela.
An FBI official said the fourth suspect, Abdel Nur, a citizen of Guyana, was believed to be at large in Trinidad.