Black Lives Matter activists protest at Cambridge City Hall for affordable housing

"Brick by brick, wall by wall, racist systems have to fall" were among the slogans four Black Lives Matter protesters chanted Wednesday morning, after chaining themselves to the front door of Cambridge City Hall in Cambridge, Massachusetts. 

The protesters are asking the city to prioritize building affordable housing, the Boston Globe reported. Police spokesman Jeremy Warnick told the Globe that police would remain on the scene until the demonstration ended and that city hall employees would use an alternate entrance to the building. 

At around 8:30 a.m. Eastern, the Black Lives Matter Cambridge chapter put out a call for on Facebook additional supporters to help them "shut down" city hall. According to the Globe, two female protesters had chained themselves to each other by the neck, using U-shaped bike locks. The women have used other bike locks to connect themselves to the city hall door handles.  

The women were also connected by the arms to two other male protesters. The men's arms were locked in plastic tubing and wrapped with red duct tape, the Globe reported.

On Facebook, the BLM chapter also out a set of affordable housing demands:

1. Inclusionary housing program

As of 9:40 a.m. Eastern, the protest was continuing at city hall.

This is a developing story and it will be updated.