SAN FRANCISCO - Police arrested dozens of people during a raid of an Occupy San Francisco encampment outside the Federal Reserve building early Sunday.

San Francisco Police Officer Albie Esparza said that around 4 a.m., officers arrested about 55 people for illegal lodging.

Esparza said that before police moved in on the encampment, demonstrators had been warned hourly for 24 hours that they were subject to arrest. The arrests Sunday came after at least 85 people were arrested Wednesday when police cleared a separate Occupy encampment in nearby Justin Herman Plaza.

A deadline for Occupy Pittsburgh to leave the BNY Mellon Corp.-owned park where it has been since early October passed Sunday with protesters vowing to winterize the camp and saying they would evict the bank instead.

BNY Mellon asked the protesters to leave by noon Sunday, concerned about reports of hypothermia and the use of propane heaters, gas-powered generators, and other devices in the small Mellon Green park. Protesters responded by noting that there had been no such cases of hypothermia reported and that no one was using heaters or kerosene-powered or gas-operated generators inside the tents set up in the privately owned park.

About 100 tents and varying numbers of people have been occupying the park since mid-October, but BNY Mellon on Friday asked them to vacate it over the weekend.