Chinese authorities have arrested a local government official and a businessman suspected of sexually assaulting a woman at a business gathering, in a case that has sparked outrage in the country.

The woman was allegedly assaulted at a karaoke bar in Hangzhou after an official dinner involving executives from several companies and officials.

Local authorities said an investigation had found the woman was sexually assaulted by both men, adding that she had been pushed to the ground by one of them, causing injuries to her lower back.

Both suspects in the case have been