April 10, 2020
Singapore closed its schools on Wednesday in response to a rising number of coronavirus cases.
But one mother told local media that, during her daughter's geography lesson, obscene images appeared on screen, before two men asked girls to "flash".
Zoom told the BBC the company was "deeply upset" about the incidents.
Zoom recently changed its default settings for home-based learning, and issued a guide for teachers to secure their "virtual classrooms".