Latest developments in the Occupy protests

Some of the latest developments in the Occupy protests:

GEORGIA

Police arrested 20 people after an Occupy Atlanta protest rally in a city park spilled onto the streets and officers converged on them on motorcycles, riding horseback and in riot gear.

A crowd of several hundred protesters had gathered at Woodruff Park, the scene of about 50 arrests of demonstrators last month, and set up tents. Organizers had said they planned to stay overnight despite warnings from the mayor and police that anyone there past the 11 p.m. closing would be arrested.

While most protesters left the park, a few people stayed behind. And as demonstrators poured onto Peachtree Street and downtown, a police officer on a motorcycle drove into the crowd, sparking a confrontation between officers and protesters that turned tense at times.

Police issued a statement early Sunday saying 19 people who either refused to leave the park after the 11 p.m. closing time or blocked nearby roads were arrested. The statement also said another person accused of assaulting a motorcycle officer on patrol was arrested and charged with aggravated assault and obstruction.

DISTRICT OF COLUMBIA

Police and Occupy DC protesters are offering conflicting accounts about a weekend incident in which a motorist struck three protesters near a downtown demonstration.

Police said Saturday that a driver will not be charged for striking the three people Friday evening.

Assistant Police Chief Lamar Greene said at a Saturday evening press conference that police concluded from talking to two witnesses that the collision was unavoidable.

But Heidi Sippel said that she, her 13-year-old son and her wife Brandy Sippel were taking part in the demonstration when a silver Lexus sped toward them. The driver slowed down, threw up his hands in apparent frustration and then drove forward, hitting them, she said. Brandy Sippel, who is six months pregnant, was grazed by the car's rearview mirror. Heidi Sippel said she and her son were both hit by the front of the car.

A man identified in a police report as the vehicle driver, Shawn Valentine of Clinton, Maryland, said he was at work when reached by telephone Saturday night and could not speak about the incident.

OREGON

Portland Police Bureau chief Mike Reese has told members of Occupy Portland that concerns about their security in camp and on marches are warranted, but says protesters must work more closely with police.

The meeting between Reese and members of the protest was held after a 30-year-old man was charged with shoving a police officer into a moving bus during a downtown march on Wednesday.

Organizers say that it's difficult to predict how large marches will become or where they will go. The movement bills itself as leaderless, making it more difficult for police to communicate directly with people making decisions.

Organizers told Reese that several marchers were threatened with pepper spray and batons on Wednesday for failing to comply with police orders.

Reese responded that his officers acted appropriately.

OHIO

The Occupy Wall Street movement has spurred demonstrators in Cincinnati to form their own political party.

Spokesman Tyrone Givens tells The Associated Press that he and other Cincinnati-based protesters traveled to New York's Occupy site to pitch the idea. He says the party is vetting six potential candidates for local office from Ohio, New York and Kentucky.