Baltimore Riots: Protesters Defy Curfew, Again Clash With Police

Authorities said the curfew has been largely successful.

— -- Protesters defied a citywide curfew in Baltimore tonight, and police eventually responded by using smoke canisters and pepper balls in an attempt to disperse the crowd. Authorities said the curfew has been largely successful, with 10 arrests in the city by midnight.

"Curfew is, in fact, working," Police Commissioner Anthony Batts said. "The city is stable. We'd like to keep it that way."

After appeals to disperse as the 10 p.m. curfew began, including one on the ground from Rep. Elijah Cummings, D-Md., and others in the air from police choppers, the police line slowly moved forward, but to no avail.

The crowd defying the curfew appeared to be much smaller than the ones out earlier today and, at times, it seemed the media may have outnumbered the residents. But there was a small contingent that refused to move and when they started throwing objects, including water bottles and bricks, police responded.

Police earlier used bullhorns as a reminder for the curfew, which is slated to last until 5 a.m. Wednesday. Police said certain exceptions would be allowed, including for going to and from work and medical emergencies.

Some 2,000 National Guardsmen were deployed to the city after Maryland Gov. Larry Hogan declared a state of emergency.

The riots began Monday afternoon shortly after the funeral of Gray, and resulted in more than 250 arrests and injuries to at least 20 police officers Monday night into Tuesday. They began after a week of peaceful protests.

President Obama Tuesday said there was "no excuse" for the violence, looting and arson.

Get real-time updates as this story unfolds. To start, just "star" this story in ABC News' phone app. Download ABC News for iPhone here or ABC News for Android here.