White powder envelopes close NYC bank branches

Four of the mailed envelopes contained an identical note, which included the language “Happy May Day,” the spokesman said.

The incident comes on the eve of a planned day of protests organized by the Occupy Wall Street movement and labor groups across the country. According to a website called maydaynyc.org, demonstrations are planned in New York City against “the corporations who rule our city.”

Ed Needham, a member of Occupy Wall Street’s New York media team, said he had found no connection between the incident and his movement. “It doesn’t sound like something that we would do,” he said.