Yesterday, envelopes containing a suspicious white powder were sent to seven Manhattan locations: Five were Wells Fargo branches; one was the headquarters of JP Morgan Chase; and another was the mail sorting room for Mayor Bloomberg. Hazmat teams were dispatched to the various locations, but ultimately the police found the substance to be corn starch. However, some of the envelopes did contain a note, with the words, "Happy May Day," and "This is a reminder that you are not in control. Just in case you needed some incentive to stop working. We have a little surprise for you. Think fast."

The NYPD told ABC News that the mailings targeted mail room workers, "Apparently, the message was aimed at the mail room workers among the '99 percent.'" While Occupy Wall Street has been planning May 1 disruptions, members of its media team have insisted, "It doesn’t sound like anything that’s part of the plans for tomorrow."