MCLEAN, Va. — President Barack Obama says U.S. intelligence and counterterrorism officials don’t have any specific, credible information suggesting a potential terrorist attack against the U.S. during the holidays.

Obama the comment during a visit at the National Counterterrorism Center in Virginia, where he got a briefing Thursday.

The president is trying to reassure Americans that the government is doing all it can to protect them. Obama also says the country must be vigilant during the holidays.

Obama says the types of threats have evolved, and that people acting on their own and in small groups are harder to detect. He’s pointing to the shooting in San Bernardino, California as an example.