Onnuri Church probes hack after broadcast hijacked by North Korean flag

A North Korean flag briefly appeared during a live-streamed worship service from one of Seoul’s largest Presbyterian churches, prompting an urgent investigation into what church officials are calling a cyberattack.

The incident occurred Wednesday morning during an early service at Onnuri Church’s Seobinggo campus in Yongsan, South Korea.

While Pastor Park Jong-gil was delivering his sermon, the broadcast suddenly cut to a full-screen image of the flag of North Korea, accompanied by unidentified background music. His audio was muted during the disruption, which lasted around 20 seconds.

The unexpected clip appeared on the church’s official YouTube channel and was quickly captured by viewers, who began sharing it across online platforms and communities.

On Thursday, Onnuri Church issued a public apology on its website and confirmed it was treating the event as a deliberate cyber intrusion.

‘An unplanned video was transmitted during the livestream of our early morning worship on 18 June. We believe this resulted from a hacking incident,’ the statement read. ‘An internal investigation is underway, and we are taking immediate measures to identify the source and prevent future breaches.’

A church official told Yonhap News Agency that the incident had been reported to the relevant authorities, and no demands or threats had been received regarding the breach. The investigation continues as the church works with authorities to determine the origin and intent of the attack.

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