The Federal Bureau of Investigation (FBI) is presently involved in terrorism investigations involving 300 people who entered the United States as refugees, a Department of Homeland Security (DHS) senior official told reporters on Monday.

Axar.az reports that, DHS officials noted the individuals under investigation may include some refugees who have since become naturalized American citizens.

"The FBI is currently looking and investigating active terrorism-related investigations into approximately 300 individuals who were admitted to the United States as refugees," the official stated.

The news comes as the US president signed a new executive order on immigration on Monday.