peter: many mornings, i cycle to work through the tiergarten park in the heart of berlin. and it's impossible to overlook the rising number of homeless people, many of them from eastern europe. local authorities were already struggling to deal with the problem, but alarm bells really began to ring when a berlin woman was recently murdered in viereck has been looking into the situation of the homeless in berlin, and she met up with michal from poland at central alexanderplatz, which he calls home. linda: even though he lives in the middle of berlin, he feels as if he were invisible. three years ago, michal came here with nothing but a backpack. since then, he's been sleeping on the streets. michal: when i first came here i slept at alexanderplatz. back then, i was one of a larger group, 10 or 15 people who slept under this bridge. all of us were polish. a few russians joined us. people of the same kind stick together. we were all in the same situation. linda: more and more immigrants from eastern europe live on the streets of berlin. the number is estimated at between 3000