The public prosecutor's office in Guatemala says it has not yet accepted the resignation of one of its officials, Otto Ardon, who has been investigating the high-profile killing of Bishop Juan Gerardi last April.

Mr Ardon offered to resign, citing personal reasons.

He will continue working on the case until December 15th, when a final decision is made.

Bishop Gerardi, who had just presented a report accusing the army of many abuses committed during the civil war, was found bludgeoned to death.

Mr Ardon and his team insisted it was not a political crime and arrested a priest for his murder.

Human rights and church groups says the prosecutor has carried out a biased investigation.