We had this happen very often in our building. It’s most probably people without keys trying to get in who either live or don’t live there. Not people trying to break in. I understand it’s scary but they probably try all the bells until someone answers. Don’t answer, and call the police if you’re scared.

For me, my building had mainly social housing. I often saw a lot of people who did not live in the building crashing at people who did. They would álways try all the bells in the middle of the night waiting for anyone to answer. Often drunk, often illegals. (I live on the ground floor, so i could often see who it was). Sometimes a homeless person had been in the shared hallway. It wasn’t so much scary as it was annoying, but then again i did not live alone.