Peruvian prosecutors have filed charges against former presidential candidate Ollanta Humala, accusing him of being involved in human rights abuses during the country's fight against drug traffickers and Maoist insurgents in the 1990s.

Authorities say the charges against Humala relate to when he was an army commander at the "Madre Mia" jungle counterinsurgency base in the 1990s. Officials say the charges stem from testimony of families of a married couple. Family members say the couple was murdered by soldiers under Humala's command. One family member says he was tortured.

Humala's mission at the base was to fight against the Maoist Shining Path guerilla group and drug traffickers.

It is not known when the judge in the case will issue a decision on whether to go forward with the charges.

Humala lost Peru's 2006 presidential race to President Alan Garcia.

Some information for this report was provided by AP and Reuters.