A false tsunami alert had some Jersey Shore residents on edge Monday afternoon.

Several police departments in the state sent out messages on their Twitter feeds and Nixle alert systems issuing a tsunami warning.

A second message came about 10 minutes later calling the warning a test.

Harvey Cedar Police Chief Robert Burnaford said on Twitter that the National Weather Service in Mount Holly was testing their system.

“We apologize for the scare and are working on a solution to prevent this from happening again,” Burnaford tweeted.

National Weather Service meteorologist Patrick O’Hara told NJ.com that the service’s Tsunami Warning Center in Alaska conducted a routine test of its emergency alert system Monday afternoon. He says that these messages are clearly marked test.