One woman has been hospitalised after an attacker opened fire at a school in Germany, say police.
It happened in Bremerhaven -- 90 kilometres west of Hamburg in the country's northwest -- on Thursday morning.
Police say they have made one arrest.
The extent of the woman's injuries is unclear at this stage.
"The students are in their classrooms with their teachers," said police in a statement. "The police have the situation on site under control. Police measures are continuing."
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