The 23 consecutive push notifications containing abnormal content were sent out via the television broadcaster’s mobile news app within 21 minutes at around midnight.

Users took to Facebook to share screenshots of the spam notification, which included messages such as “yooooooo,” “hihi,” “testing,” as well as messages mentioning live streaming of chief executive candidate John Lee Ka-chiu’s press conference.

The broadcaster said they have since carried out multifaceted investigations and have immediately strengthened system monitoring to prevent the reoccurrence of similar incidents.

“[The] Information Technology Department of TVB has also reported to the police,” TVB wrote in a statement, adding that officers of the Cyber Security and Technology Crime Bureau have collected evidence in concerned offices at TVB City today.