GERMAN special forces stormed a hospital last night after a woman reportedly broke in and set off fireworks.

       Smoke was seen billowing from a room at the Luisenhospital in Aachen as the 65-year-old barricaded herself in and triggered a siege.

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       German special forces stormed a hospital last night after a pensioner reportedly broke in and set off fireworks Credit: Google

       A helicopter circled above as patients were evacuated and elite armed police units from the SEK moved in shortly after 7.40pm local time.

       After several hours, armed personnel managed to detain the suspect and end the siege by about 11pm.

       The alleged suspect was given medical treatment at the scene following her arrest, Welt reported.

       It was unclear if the woman was armed and if there were any injuries or hostages inside the 378-bed hospital in western Germany.

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       Police did not confirm if the "suspicious person" was alone or posed a threat to others but a cordon was in place and locals told to avoid the area.

       Roads were sealed off and trains cancelled as the authorities dealt with the stand-off.

       Cologne Police, who led the operation, previously said: "According to current information, a female (65) entered the hospital in the afternoon.

       "Shortly afterwards, employees noticed smoke developing near the woman.

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       "The 65-year-old has now barricaded herself in a room.

       "The surrounding rooms have been evacuated.

       "Special forces are on site."

       The SEK was founded in 1974 in response to increasing terrorist threats and organised crime activities in Germany.

       They specialise in hostage situations, kidnappings, raids and dealing with barricaded suspects.