Jacksonville, Florida port authorities say heart medication triggered a bomb scare at the Carnival Cruise Line terminal Saturday afternoon.

Security personnel with bomb-sniffing dogs detected a suspicious substance in one of the bags during the embarkation screening process for the Carnival Celebration.

Authorities evacuated the terminal and searched all the bags. The all-clear to board came about seven hours later.  Carnival Cruise Lines gave all passengers a $15 shipboard credit for the delay.