Armed police have evacuated a primary school and scrambled a helicopter after a threat was made via telephone.
Police in the Mümmelmannsberg region of Germany evacuated the school and have closed the area down with roadblocks.
Hamburg police confirmed a helicopter was dispatched and they are at the scene, it is unclear how many students are at the school.
A spokesman for the school confirmed that entrances were sealed off and students of grade 11 were evacuated.
Hamburg police initially wrote on Twitter to confirm they were dealing with a “major police operation,” was in place.
They wrote on Twitter, “In Mümmelmannsberg there is currently a major police operation.
“We will get back to you shortly with details.”
Adding, “In Mümmelmannsberg there are currently several road closures – please avoid the area!”
The incident took place just after 1pm and Hamburg police said, “We are in Mümmelmannsberg currently working with numerous emergency services. Our ‘Libelle’ police helicopter is also in use.”
The police added that as far as they knew, “only Mümmelmannsberg street is closed.”
In an update just before 3pm, Hamburg police said, “We were able to identify the alleged caller who announced a killing spree and received information that the announcement had not been serious.
“Our measures are currently being reduced. The investigation is of course ongoing.”
Earlier unconfirmed reports of a “gunman,” and a witness said around “10 cars” rushed to the scene, with armed police.
In a translated tweet from one witness said, “Just a gunman with us in the district, the police have closed the entire district and is even with 10 cars in front of our shop.”