The Eastern Magistrates' Court. Photo: HK Government

Two secondary school students appeared in a Hong Kong court on Thursday and denied installing hidden cameras in a school’s changing rooms to film videos of classmates and primary school girls.

The Juvenile Court on Thursday heard that from September 2016 to March 2017, the two students set up chat group on Telegram and planned the recording, Apple Daily reported. A total of 44 videos involving 80 female classmates and girls from primary school were recorded in the school’s changing rooms.

Police arrested seven students and later released four. One student pleaded guilty in an earlier court hearing. Two students denied the charges of obtaining access to a computer with a view to dishonest gain for oneself or another and conspiracy on Thursday.

The incident came to light when a student informed a teacher after finding three video clips being uploaded in a shared Google drive on March 24, 2016. The teachers failed to find any hidden cameras.

A teacher identified one of the suspects after she repeatedly watched the video footage in slow motion. She recognized the boy because of his big eyes. Several boys were taken to the principal and the school reported the case to police.

Police confiscated an iPhone, an iPad and a GoPro camera set up in the changing rooms and classroom floor to either capture the girls changing or walking over the device, the court heard. The two boys and their school cannot be identified for legal reasons, but local media said it was a prestigious school in the city.

The court also heard that the boys gave statements to the school confessing their involvement, news website HK01.com reported. But defense lawyers objected to the admission of the statements as evidence on Thursday, arguing that the defendants made the statements in a threatening and oppressive situation.

The lawyers also objected the admission of the videos, arguing that the teacher extracted or forced their clients to tell him the Google account password. The trial continues on Friday.

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