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As you have just heard, it is imperative that the affected people contact the quarantine authorities first. But the reality is that at that time, the club often left a fake phone number, so two-thirds couldn't be contacted. The police will confirm by selecting the owners of the mobile phones and credit cards used in Itaewon at that time.

I'm Jeong Seong-jin.

<Reporter> The

way to find a person who has contacted a confirming person in the current Itaewon club is to check the list of visitors to fill in when entering.

[Your name, write your phone number.]

But if it is written in false form, there is no way to contact you.

On the 2nd of May, when the first confirmers went, the list of club visitors at dawn appeared to be around 1,900, but only a third were contacted.

[Park Won-soon / Seoul Mayor: (Visitor list) I have confirmed that it is quite poor. (Out of 1,946) Only 637 calls were made, and the remaining 1,309 are still out of

reach .] It is estimated that the contact number is false, or visitors are unwilling to answer the phone due to the identity of the club.

Many foreign visitors do not have any contact information.

[Yongsan-gu Office Official A: (Foreign visitors) Some people do not have cell phones, but they are. We are checking now.]

During the golden holiday period, many times the club was revisited twice or three times.

[Yongsan-gu Office B: About 1,900 people (club visitors) have a day, and they are contacting the phone number confirmed about five times (holiday).] The

Seoul Metropolitan Government and the quarantine authorities have all information including CCTV and card payment details. And decided to cooperate with the police.

[Park Won-soon / Seoul Mayor: Citizen's collapse and anger can't tell the story of the collapse of the tower because of just a few people.] The

police are expected to form a quick response team and match the base station access records of the carriers to identify visitors. .

(Video coverage: Donghwan Shin, Video editing: Jongtae Kim)