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BERLIN, Sept. 11 (Xinhua) -- A total of 6 person were slightly injured in Frankfurt Airport as an unknown person sprayed an irritating substance at the Airport of Frankfurt am Main, the police said.
The attack took place at the switch island in Terminal 1 of the airport. The fire brigade said the cause was still unclear and an investigation is under way.
The fire brigade's work finished and the switch opened again. No readings are more noticeable, German police at Frankfurt Airport said on its Twitter account.
