A woman wearing a black bandanna on her face lit the flag on fire Tuesday night as protests continued outside of the secure zone around the Wells Fargo Center in Philadelphia. Someone stood nearby waving a Palestinian flag.

Protesters also set pro-Bernie Sanders fliers on fire that were hanging on steel fencing around the site, the Associated Press reported.

Separate groups of Sanders supporters, protesters marched against police brutality and others joined together in the streets outside of the convention.

Some of the people chanted "keep the peace." Police cars were driving by with their sirens blaring to try to block them.

The groups marched up Broad Street outside of the arena where Hillary Clinton on Tuesday became the first woman to win the presidential nomination of major US political party.