Hundreds of people rallied and blocked traffic around Harvard Square in Cambridge as they protested two grand jury decisions to not indict white police officers in the killings of unarmed black men.
Demonstrators held up their hands while chanting "hands up, don't shoot" Friday night. They also marched on streets around Harvard University and lay down in "die-in" protests similar to ones that have occurred across the country.
There were no reports of violence or arrests.
The rally was prompted by grand jury decisions to not indict a New York City officer in the chokehold death of Eric Garner and a Ferguson, Missouri, officer in the fatal shooting of Michael Brown.
Similar demonstrations were held in the Boston area last week.