Venezuela hostage-takers arrested

CARACAS, Venezuela (CNN) -- Police on Wednesday tried to determine what charges to file against the men who held up to 52 hostages in a botched bank robbery in central Venezuela before being detained.

The men stormed a bank in the town of Altagracia de Orituco, in the state of Guarico, and took hostages just before noon on Monday before releasing a few during negotiations with police.

The number of hostages ranged from 30 to 52, including a pregnant woman and a 15-day-old infant, and most were held for 28 hours.

The robbers were under the influence of "stimulants," said Ramon Rodriguez Chacin, the Venezuelan minister of the interior and justice.

Authorities allowed the captors to leave the bank by ambulance on Tuesday, with five hostages being used as human shields, after the men threatened to kill their captives, authorities told CNN.

Those hostages who remained inside the bank were then freed, and the captors later released their "human shields" on a highway near Caracas. Watch as the distressed hostages at the bank emerge »

Authorities detained four captors after intercepting them on a road leading to the western part of the country, and one other was unaccounted for, the Bolivarian News Agency reported. E-mail to a friend

CNN's Carlos Guillen contributed to this report.