A police officer secures the area after a shooting in Hanau near Frankfurt, Germany, February 19, 2020.

Police officers secure an area after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

Officers are seen near a damaged car after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

Police officers speak with a man as they secure the area after a shooting in Hanau near Frankfurt, Germany, February 19, 2020.

Police officers secure an area after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

A police officer secures the area after a shooting in Hanau near Frankfurt, Germany, February 19, 2020.

Police officers secure an area after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

A bullet is seen on the ground after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

Police tape is seen in the area after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

A forensic expert stands next to a bullet on the ground after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

Officers are seen near a damaged car after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

German special forces prepare to search an area after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

Forensic experts work around a damaged car after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

Forensic experts are seen outside a shisha bar after a shooting in Hanau near Frankfurt, Germany, February 19, 2020.

Forensic experts are seen outside a shisha bar after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

A police officer secures an area after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

Forensic experts work in the area after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

Police officers secure an area after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

German special forces prepare to search an area after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

Police officers secure the area after a shooting in Hanau near Frankfurt, Germany, February 19, 2020.

Police officers detain a man at a scene of a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

Police officers secure an area after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.

Forensic experts search the area after a shooting in Hanau near Frankfurt, Germany, February 20, 2020.