Philippine authorities have dismissed charges against 30 foreign nationals suspected of belonging to a kidnapping gang that preyed on casino gamblers.

Last week, Philippine National Police (PNP) and Bureau of Immigration (BI) agents arrested 44 foreign nationals in a series of raids that led to the rescue of Wu Yan, a Singaporean woman who’d been abducted from the Solaire Resort and Casino and held against her will in a Manila hotel room.

On Tuesday, the Philippine Department of Justice dismissed charges against 30 of the detained foreigners – mostly Chinese nationals – citing insufficient evidence to proceed with the prosecution. Part of the DOJ’s reasoning stemmed from Wu Yan’s inability to identify any of the 30 foreigners as having participated in her abduction and detention.

A resolution approved by Acting Prosecutor General Jorge Catalan Jr. stated that “not an iota of evidence was presented to show that [the 30 foreigners] conspired with the alleged kidnappers of complainant Wu Yan.” This absence of evidence connecting the individuals with the crime “indubitably will result to the dismissal of the complaint” against them.