State and local law enforcement agencies around the United States are being urged to remain on high alert for potential terrorist activity leading up to the 15th anniversary of the Sept. 11 attacks.

The Department of Homeland Security, in an intelligence notification distributed on Monday and obtained by Fox News, warned law enforcement partners that terrorists – specifically those aligned with ISIS – “may be inspired or directed to conduct attacks against events associated with 9/11 memorial commemorations or other mass gathering targets timed to this date.”

The report notes the symbolism associated with the somber anniversary as a motivating factor for a potential terrorist attack.

The DHS Office of Intelligence and Analysis, which distributed the bulletin in coordination with the FBI, stated, however, that it is “unaware of any specific, credible information” of a plot against the U.S. homeland.