BANGKOK – The death toll from a school shooting in Thailand's Nonthaburi province on Friday has risen to nine, authorities said on Saturday.

Citing the ministry of public health, the province's public relations department said in a Facebook post that as of 16:00 local time on Saturday, the shooting has caused nine deaths, with 14 people still hospitalized.

It was reported that a 12-year-old girl died after being sent to the hospital. Debsirin Nonthaburi School, the victim's school and the incident site, expressed condolences to the student on social media.

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Thai police summoned several students and teachers from the school on Saturday to investigate the 14-year-old gunman's motive and the source of the ammunition, saying that a press conference will be held on Sunday to announce the preliminary investigation results.

Previous reports revealed that the attack left eight people dead, including the gunman and his grandparents.