Hundreds of protesters in Philadelphia marched for a second night, protesting against racism.
The protest comes after police shot an African American named Walter Wallace to death.
The family of Walter Wallace, 27, said he was ill when officers opened fire on him.
Police say they shot him because he refused to drop the knife he was holding.
Police and federal security forces were deployed at the protest sites to ensure law and order.
The victim’s wife told officers her husband was unwell before they shot him, according to a lawyer representing his family, but they opened fire on him.