The way into the Montaza II police station in Alexandria is along a narrow ridge of broken concrete tiles and wet sand. A pool of black and green water with soft grey matter floating in it covers what must once have been a parking lot. There are more than 60 people detained inside, most of them Palestinian Syrians, half of them children under ten, their faces spotted with mosquito bites. On the third floor there's a pile of sand with parts of a broken toilet sticking out of it. A dirty blanket folded over a string separates the women and children’s quarters from the men’s. The detainees were all arrested for trying to get to Europe by boat.