Recently, it was announced that Wanna One is filming for 'Weekly Idol'. Following the report, numerous fans waited for the boy group outside the recording studio in Gangnam on July 26 in hopes to see the members. 

The huge crowd made it difficult for passersby to walk down the street. Many customers who were visiting the cafe on the first floor of the building also filed complaints. 

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Producers of 'Weekly Idol' made an announcement regarding the issue via Twitter and warned, "Complaints are overflowing due to the fans who are taking over the hallway, elevator, and the streets... We will be contacting the police if the violation continues. We dearly ask fans to follow orders."

#주간아이돌 녹화장에 찾아온 팬들의 건물복도와 엘리베이터 및 도로점령으로 인해 주변민원이 폭주하고 있습니다 주간아이돌 녹화장 건물은 사유지입니다 함부로 점령하시면 경찰에 신고가 들어갑니다(이미 신고가 접수된 상태입니다)팬들의 질서를 간곡히 부탁드립니다

— 주간아이돌 (@bestIdolone) July 26, 2017

#주간아이돌 녹화장 건물 안까지 침범하시는 팬들 자제바랍니다 차도 점령과 주차장 점령은 여러분을 포함한 모든 사람들의 안전에도 문제가 생깁니다 주의 부탁드립니다

— 주간아이돌 (@bestIdolone) July 26, 2017

The warnings by the producers and the agency did not have much effect. Ultimately, the police had to arrive at the scene to control the huge crowd. 

Incidents of Wanna One sasaeng fans overcrowding outside recording studios and even causing harms to the members are continuing to become an issue. Many netizens are demanding more strong security and measures against the fans. 

Meanwhile, Wanna One is scheduled to make their official debut on August 7.