ZHENGZHOU - Authorities in Henan province have issued arrest warrants for three police officers suspected of torturing Zhao Zuohai, a man who was wrongfully convicted of murder and jailed about 10 years.

Two of the officers, Guo Shouhai and Zhou Minghan, have been detained while the third cop, Li Deling, is still at large. They are suspected of torturing Zhao, 57, into confessing to a murder 10 years ago.

Authorities have also started a probe into the wrongful imprisonment on Wednesday, said Song Guoqiang, an official with the people's procuratorate in Shangqiu city.