Police sources, on the other hand, have been saying for some time that it would be much more difficult to set up a permanent police station at Kottbusser Tor than it was on Alexanderplatz. There is less free space at Kottbusser Tor, and the layout of the square is very confusing because of the overground subway, the traffic circle, the many streets leading into it, and the high-rise buildings. Furthermore, some parts of Kreuzberg are home to a very left-wing and partly anti-police population who could react aggressively to a new police station. To avoid constant incidents and attacks, such a precinct would need to be heavily staffed and supported by constant patrols in the surrounding area.