After last week saw employees at its MGM Macau property stage a demonstration concerning the amount of a one-off pay bonus, MGM China Holdings Limited is now reportedly facing calls to investigate the impact new table games technology may be having on workers.

According to a report from Asia Gaming Brief, Hong Kong-listed MGM China Holdings Limited, which is a subsidiary of American casino giant MGM Resorts International, was handed a petition last week imploring the company to study the possible health risks associated with the running of its Casino Chip Attribution System. The appeal purportedly claims that numerous members of staff may have been exposed to ‘unknown electrical technology use’ that has left them feeling unwell with some even claiming respiratory distress.

The petition is reportedly the work of the New Macau Gaming Staff Rights Association while its President, Cloee Chao, purportedly declared that the group previously raised concerns over the Casino Chip Attribution System technology but had yet to receive a response from MGM China Holdings Limited, which is planning to inaugurate its $3.46 billion MGM Cotai integrated casino resort later this month.

“They have already exhausted many ways to raise the issue with their company but this new casino still adopts those problematic tables despite previous calls,” Chao reportedly told Asia Gaming Brief. “They also thought they would receive all overdue bonuses as encouragement when the new casino opened but they still haven’t heard from their employer so far.”

Chao reportedly stated that the continued silence of MGM China Holdings Limited could see her group organize ‘further action’ encompassing more sit-ins alongside ‘some industrial action to protest further’.