8/3/2011 10:45 AM PDT

Bruce Beresford-Redman's Kids -- Cops Called into Family War

The family battle over former "Survivor" producer -- and current murder suspect -- Bruce Beresford-Redman's children is so intense ... police were recently called to enforce a visitation with the kids' aunts.

Bruce's parents and the sisters of his slain wife -- Monica Burgos Beresford-Redman -- have been warring over guardianship of the former couple's two children ... Camila and Alec.

In new documents filed in the case -- and obtained by TMZ -- the grandparents claim the aunts called police when 6-year-old Camila did not want to join them for a visitation.

According to the docs, the grandparents claim Camila and Alec were traumatized -- and they already think "police are bad" for taking their father away.

Bruce was arrested last month and is awaiting extradition to Mexico to stand trial for his wife's murder.

The grandparents wanted to suspend visitation with the aunts ... but instead the judge ruled both sides should stop bad mouthing each other -- and visits should continue as scheduled.