ZHENGZHOU - A police officer in charge of a labor camp in central China's Henan province when an inmate died two years ago has been detained, prosecutors announced Friday.

The police officer, surnamed Yang, was the head of the second police brigade at the labor camp in Kaifeng city. He was detained on a charge of dereliction of duty, said a spokesperson for the city's procuratorate.

A spokesperson with the municipal Bureau of Justice said earlier that inmate Mu Damin, born in 1948, was detained at Kaifeng municipal labor camp for a year from April 25, 2007, on a robbery charge.

Mu suffered from an acute illness on March 14, 2008, and was taken to Huaihe Hospital, affiliated to Henan University. He was discharged and sent home on March 17 and died there on March 19, the justice bureau spokesperson after the death.

Prosecutors from Kaifeng Municipal Procuratorate and officials of the Discipline Inspection Commission of the municipal Bureau of Justice are still investigating the death.

Investigators would disclose their results when the investigation was completed, said Zhang Zhichao, head of the local justice bureau.