After the recent uptick in piracy, the Maritime Administration is warning seafarers to stay vigilant in the Gulf of Guinea and in the Sulu and Celebes seas.

In the Gulf of Guinea, the US government agency said hijackings, kidnappings for ransom and boardings to steal valuables have shot up to 10-year highs, while kidnappings in the Sulu and Celebes seas were perpetrated by a Filipino Islamic separatist group, the Abu Sayyaf Group.