Hohenzollernplz U-Bahn station temporarily closed

Anyone know what's going on there ?

Hm, just rode past on my bike and all I noticed was a police van. But I figured they were running the drunks off again. Didn't notice anything else though.

I was travelling on the u-bahn and it went through hohenzollerplatz without stopping because of a police emergency, according to what the driver said. Later on (about an hour) I walked through there and there were several police cars and agents, but nothing that could explain why it was closed before.

I went through around 6:40pm yesterday and the Ubahn stopped there as usual. Didn´t see anything unusual.