A screenshot of the accident from a video on the internet

A bus slid into a roadside river in Shanghai's Pudong New Area on Tuesday morning, and the driver has been rescued and no passengers stayed in the bus, Shanghai police said on Tuesday.

The bus drove into the river after it knocked over two e-bikers, who were sent into the local hospital and are safe, according to the police.

A passenger who got off the bus in the previous station told the police that the driver asked the passengers to get off the bus and the driver claimed that he/she didn't feel well. Later the passenger found that the driver was unconscious as the vehicle slid forward and fell into the river, said the police.

The video clips of the site showed that the front part of the bus was immersed into the river after the accident, and the back of the bus was still on the bank.  

Further investigation is underway.