A man is arrested on the highway of Nanjing's Third Yangtze River Bridge after a bus hijacking incident in Nanjing, East China's Jiangsu province, Aug 30, 2011.

A hostage has been rescued after a coach running on the highway of Nanjing's Third Yangtze River Bridge was hijacked in Nanjing, east China's Jiangsu Province, jschina.com.cn reported Tuesday.

The bus was travelling from Huainan city in east China's Anhui Province to Xiaoshan city in eastern Zhejiang Province, the report said. Four hijackers were initially confirmed and casualties remain uncertain at the moment.

The hostage-taker, Yang Bing, was hit twice and then detained along with three accomplices on the bus, Nanjing police said.

According to the local media, at least three passengers were injured in the incident, but none was said to be seriously hurt.

They included the girl and the other freed hostage, who were said to be in a stable condition in hospital. They and another male passenger were treated for minor cuts received during the incident.

"The suspect Yang Bing was in an impulsive condition and intended to hurt the hostages," police said. "To ensure the safety of hostages, police opened fire and injured Yang."

Yang was one of the suspects in the killing of a man in a fight in Ningbo, Zhejiang Province, at the weekend, police said.

(Shanghai Daily contributed to this story,)