On October 19th, Na-Eun was scheduled to attend the 'Dongguk Love 111 Campaign to Celebrate the 1,000th Anniversary, Commemorative Ceremony for Celebrity Alumni Donations and Public Relations Ambassador Appointment' event at Dongguk University's Seoul campus. However, just two hours before the event was set to start, an anonymous caller contacted the police, saying, "Explosives have been installed."

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No explosives had been found at any of A Pink's bomb threats, and the police have been looking for him without much success. They explained, "He is known to be Korean-American, so it's difficult to pinpoint his whereabouts. When he contacted the police, he hid his number and it was an international call."

The police are currently investigating the matter, and he is currently on Interpol's Red Notice list. The Red Notice is the highest notice in Interpol notices, and is "to seek the location and arrest of a person wanted by a judicial jurisdiction or an international tribunal with a view to his/her extradition."