Coming just a month after Project Gotham Shield, a major nuclear detonation drill in the New York-New Jersey area, a false alarm that went out to some people’s television sets Tuesday might have scared some in New Jersey.

As NBC New York reports, a nuclear power plant warning issued in Cumberland and Salem counties was sent out by mistake.

The message that was sent out said “a civil authority has issued a nuclear power plant warning for the following counties/areas.”

A short time later, the New Jersey Office of Emergency Management Tweeted that the emergency alert was “false.”