Police in New York have been gathering evidence at the homes of two men arrested trying to board flights to Egypt and Somalia on Saturday from JFK airport.
According to the FBI the two, who are both American citizens, were intending to contact al Qaeda linked jihadists.
Undercover officers had recorded conversations with them about joining the Somalian extremist group al- Shabab.
It is just over a month since a car bomb in New York’s Times Square failed to explode leading to the detention of the alleged terrorist Faisal Shahzad.
These latest arrests come as the US authorities are increasing their surveillance on so-called radicalised suspects.