A man believed to be a volunteer for the Bernie Sanders campaign attempted to publish an obituary for Hillary Clinton in Nevada on the eve of the state’s Democratic caucuses and has been reported to the Secret Service.

The man, who identified himself as Don Schubert, was asked to leave the lobby of the Las Vegas Review Journal on Friday after filling out an obituary form for Clinton, the newspaper reported. A security guard at the newspaper said Schubert was wearing a Sanders campaign sticker on his shirt at the time and drove off in a maroon car with several Sanders stickers on the back.

Schubert later told the Review Journal that he submitted the obituary in an attempt at “political humor.” He also acknowledged that he was contacted by the Secret Service but did not expect to be arrested for the incident.

Martin Mulholland, a special agent in charge of government and public affairs at the Secret Service, said the agency is aware of the incident.

"Our Las Vegas Field Office is conducting appropriate investigative follow up in conjunction with our local law enforcement partners," Mulholland said in an email.

The Sanders campaign's website lists an event last month at the home of a Don Schubert of Long Beach, Calif., and a volunteer phone bank at the same location. A man by the same name posted in a Facebook group for Sanders volunteers acknowledging the Las Vegas newspaper's story but did not elaborate on the situation.

The Sanders campaign declined to comment.

The incident was reported one day before the candidates, who are polling in a dead heat in Nevada, were set to face off in the state’s caucuses. Sanders and Clinton supporters have clashed several times in recent days, including an incident over the shirts some Clinton backers were wearing when caucus sites opened Saturday.

National Nurses United, which backs Sanders, accused Clinton supporters of changing into T-shirts that could help them look like NNU members at caucus sites. NNU’s shirts were red, and the pro-Clinton shirts worn by some were dark pink.