What's the police doing here?

Over the last few weeks we have witnessed various instances of violent police behavior in Jaffa.
Right now Gan HaShanyim (the Gazan's park) is full of police officers (some of them fairly high brass) as well as special "Yasam" forces, horses, arrestees trucks, you name it. A police helicopter hovers above our heads.

I just hope this isn't going to be another home demolition nor eviction.

Anybody knows what they are up to?