The younger brother of Vice President Joe Biden was hospitalized Saturday after opening a package that contained a suspicious white powder at his Boynton Beach, Fla., home.

Frank Biden, 57, told the The Palm Beach Post that upon opening a manila envelope, which was addressed to him and postmarked from India, his skin came into contact with the unknown substance.

He immediately called police and was later transported to a local hospital where he was held overnight.

“I was the only one who came in contact with the powder so they kept me,” Biden told the Post. “I’m fine.”

The FBI later declared the contents of the package “not threatening in nature” based on preliminary tests.

There was no immediate comment from the vice president’s office regarding the incident involving his brother.

Frank Biden is the president of a Florida-based real estate development and consulting firm. He is a former member of the Clinton administration and active supporter of the Obama-Biden administration and their re-election campaign.