Indonesia has executed three death row inmates who were convicted of mutilating a man and murdering a family.

Attorney General Office spokesman Untung Arimuladi says the three Indonesian men were executed by firing squad Friday at a high-security prison on Nusakambangan island.

A court in South Sumatra province had sentenced 48-year-old Jurit bin Abdullah and 52-year-old Ibrahim bin Ujang to death in 1998 after they were found guilty of beheading and mutilating a man.

The third inmate, 47-year-old Suryadi Swabuana, was convicted of killing an entire family at a house in the province in 1991.

Arimuladi said six other convicts are to be executed this year.

More than 140 people are on death row in Indonesia, mostly for drug crimes and about a third of them are foreigners.