Police say they found a warning message written in Arabic inside a box discovered the previous day at Incheon International Airport.Officers say the message, written on a small piece of paper, reads, "This is the last warning to you. God will punish."The message had been printed and police say the message contained grammatical mistakes, suggesting it may have been translated online or typed by someone with limited Arabic skills.The latest development comes a day after a box suspected to contain an explosive device was discovered in a men's bathroom at the airport.However, once opened, officer found two butane canisters taped to a bottle of mineral water.As well as the message, the box contained guitar strings, electric cords, batteries and some pieces of vegetables.Police say that, while they are not completely ruling out the possibility of it being linked to an Islamic terror group, the crudeness of the package and the poorly-written note makes them believe the chances are very slim.Korean officials have been on guard since the group that calls itself Islamic State listed South Korea as a potential target in a recent edition of its magazine and a subsequent propaganda video.Officials say a special investigation team of 50 detectives are scouring CCTV footage inside Incheon International Airport as they attempt to track down the person or persons responsible.Ji Myung-kil, Arirang News.