GUATEMALA CITY, Guatemala (AP) – Inmates holding more than 500 women and children hostages in a prison farm on Monday demanded an airplane to take them to Cuba, a prison official said.

At least seven people – four guards and three inmates – were killed and 20 were injured in the takeover Sunday of Guatemala’s largest penal facility.

Police, national guardsmen and soldiers surrounded the Pavon prison farm Monday, and the nation’s top civil rights official negotiated with some of the several hundred inmates.

Journalists outside the prison heard an exchange of rifle and machine-gun fire Monday morning. There was no official comment on the shooting.

Prison officials did not say how many inmates were involved in the takeover, but negotiators who entered the prison Sunday night said it appeared to be about 250.

The inmates raided rifles from the armory and seized control of the prison farm. They were holding hundreds of women and children who had made Easter visits to imprisoned relatives.

Prison spokesman Conrado Monroy said their hostages included 153 children, 365 women and seven men visitors as well as five firefighters, a fire commander, a Red Cross worker and an undetermined number of guards.

Monroy told reporters the inmates on Monday demanded an airplane to take them to Cuba. He gave no details.

Human Rights Director Gonzalo Menendez de la Riva refused to speak to reporters when he entered Pavon on Monday to take over the negotiations.

The inmates also demanded better food, better treatment, a change in prison management and reduced sentences. They made the demands in a petition given to negotiators Sunday night.