Two prison inmates convicted of murder have taken two guards hostage for up to nine hours while making a list of demands.
The inmates barricaded themselves in a guard room of Hallby prison, 100 kilometres west of Stockholm in Sweden, on Wednesday (local time), according to local media.
One hostage was released after seven hours while the other was freed after nine hours, Aftonbladet reported.
The two hostages, reportedly a man and a woman, were held captive by the convicted murderers who covered surveillance cameras and demanded a helicopter.
The inmates were also believed to be armed with razor blades.
The Swedish Prison and Probation Service told Aftonbladet it was a "very serious incident".
Inmates make bizarre demand
In the afternoon, according to SVT and Aftonbladet, they demanded all 20 inmates of their wing should get pizza with kebab toppings, and in return one hostage could be released.
Shortly afterwards, photos showed police officers putting several pizza boxes into a car.
The pizzeria confirmed to TT that 20 kebab pizzas had been taken away.
The police initially only said that a major operation was taking place at the prison and that officers with special authority were on the scene.
In the afternoon, they confirmed on their website that the two inmates had barricaded themselves in a room where two prison guards were also located.
An investigation into the abduction has been launched.
Hallby prison has 98 spaces in security class 1, the highest security level for Swedish prisons, according to the Swedish Prison Inspectorate.
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