If you’re stressed out over the holidays, here’s a little tidbit to get you even more stressed! Federal agents are now warning of an al-Qaeda attack on the New York City subway.

The AP reports:

Federal authorities are warning law enforcement personnel of a possible terror plot against the New York City subway system during the holiday season.

An internal memo obtained by The Associated Press says the FBI has received a "plausible but unsubstantiated" report that al-Qaida terrorists in late September may have discussed attacking the subway system.

The report indicates that al-Qaida terrorists "in late September may have discussed targeting transit systems in and around New York City. These discussions reportedly involved the use of suicide bombers or explosives placed on subway/passenger rail systems," according to the document.

"We have no specific details to confirm that this plot has developed beyond aspirational planning, but we are issuing this warning out of concern that such an attack could possibly be conducted during the forthcoming holiday season," states the warning, which is dated Tuesday.

I don’t really know why the Feds bother issuing statements like these. There is essentially no information of value insofar as self protection, so all it can really do is get people freaking out. Happy Holidays, New York: you’re under terrorist threat of attack.