German tabloid Bild says police are being drafted in from Austria to help in Munich. The Germany-Austria border is just 42 miles (72km) away.
The newspaper also reports that all of the available security forces personnel in Bavaria, as well as neighbouring states Hessen and Baden-Wuerttemberg, are being sent to the city.
23: 02 Munich shooting investigated as “suspected terrorism”
Munich police are using the term “suspected terrorism” in connection with the shooting at a city mall.
22:50 Munich’s transport suspened
Munich’s main train station has been evacuated and the city’s transport system has been suspended.
People are offering space in their own homes on social media, using the hashtag #Offenetuer – which means “open door” – for people who are stranded without a way to get home.
Police have asked everyone to stay indoors.