Washington (CNN) A package resembling those allegedly sent by Cesar Sayoc was recovered Thursday and was addressed to Democratic billionaire Tom Steyer, the FBI tweeted Friday.

"The FBI has confirmed a package was recovered last night in California, similar in appearance to the others, addressed to Tom Steyer," the FBI said in its tweet.

Steyer's organization, The Next Generation, was "notified late last night" by USPS security, who said they had called the FBI and confirmed it was a suspicious package, according to Aleigha Cavalaier, NextGen's communications director.

"They also told us that they suspected (it) was from the same guy, but it was mailed to a different address," Cavalaier said.

CNN previously reported on a mail bomb allegedly sent by Sayoc to Steyer last week.

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