"It puts people in danger," Cross, 32, said of limiting the size of the crowd overnight.

"Two people isn't much of an occupation," said her friend, Elise Heroux, 19, of Rosedale.

By Tuesday afternoon, a second message had come out from the group's email account, stating that Wednesday is a deadline for the protesters to respond to the city and that "no specific date for termination" of the protest had been set.

About 150 protesters attended Occupy Baltimore's meeting Tuesday at 8 p.m. During the meeting, which lasted several hours, the protesters discussed plans to communicate with Recreation and Parks on Wednesday.

Protests in other cities have included both peaceful interactions with the police and violent confrontations. In Manhattan, protesters clashed with police — one widely viewed video showed police pepper-spraying protesters, and a photo appeared to show an activist striking an officer with his forearm. In Denver, police cleared activists from a park next to the state Capitol, moving them farther away. And in Oakland Tuesday, riot police arrested 75 protesters.

Thus far, there have been no arrests or forcible removals in Baltimore. On Tuesday, activists offered differing opinions on whether they would go along with an order forcing them to move.

As she set up signs Tuesday that say "Stop Banks' Robbery" and "You know things are bad when white suburbanites come out," Athena Tsakos, 30, a teacher from Pigtown, said the Occupy Baltimore movement has had no problems with local police and she expects it to stay that way.

"We're fighting the banks, not the police," she said. "The police are working-class people just like us."

But Asher Strauss, 23, who lives near Penn Station, said the city's ultimatum would push homeless people out of the square. Activists might have to stand up to officers, if forced, he said.

"They're trying to box us in," he said of the city. "You don't know who's homeless or not. We're all here.

"It doesn't matter if you're homeless. Everybody is facing the consequences of the system. We're going to take a stand."