A former campaign adviser to Donald Trump has threatened to reveal the addresses of delegates if they vote against the Republican presidential hopeful at a contested GOP convention.

"If Trump does not run the table on the rest of the primaries and the caucuses, we're looking at a very, very narrow path in which the kingmakers go all out to cheat, to steal, and to snatch this nomination from the candidate who is overwhelmingly selected by the voters," Roger Stone said Monday evening during an interview on Freedomain Radio.

"I have urged Trump supporters: Come to Cleveland. March on Cleveland. Join us in the Forest City."

"We're going to have protests, demonstrations. We will disclose the hotels and the room numbers of those delegates who are directly involved in the steal," Stone threatened.

The outspoken and often controversial Trump ally urged the billionaire's supporters "to visit [delegates'] hotel[s] and find them."

In Pennsylvania, where delegates are unbound and free to vote for anyone on the first ballot, Stone said he would reveal which individuals vote against Trump.

"If you're from Pennsylvania, we'll tell you who the culprits are," he said. "We urge you to visit their hotel and find them. You have a right to discuss this if you voted in the Pennsylvania primary, for example, and your votes are being disallowed."

A spokeswoman for the Trump campaign declined to condemn Stone's threats.

"Roger Stone is not affiliated with the campaign," Hope Hicks wrote in an email to the Washington Examiner.