Democrats in Maryland say their supporters are receiving an anonymous robocall telling them that Gov. Martin O'Malley's (D) campaign for reelection has "been successful" and that the "only thing left is to watch it on TV tonight."

The O'Malley campaign said the call originated from the 202, or Washington, D.C., area code, and that they first received word of it at around 6:30 p.m.

During the call, a woman says: "O'Malley and President Obama have been successful. I am just calling to let everyone know that Governor O'Malley and President Obama have been successful. Our goals have been met. The polls are correct, and we took it back. We're OK. Relax — everything is fine. The only thing left is to watch it on TV tonight. Congratulations, and thank you."

Mark Giangreco with the O'Malley campaign said the call could have come from O'Malley's Republican challenger, former Maryland Gov. Bob Ehrlich.

"We don't know where these calls are coming from," he said, "but it wouldn't be the first time Ehrlich resorted to dirty tricks in a desperate attempt to mislead voters on the eve of the election."  

Ehrlich's campaign was accused of busing homeless Pennsylvania and Delaware residents into Maryland in 2006 to pass out fraudulent sample ballots.

On Tuesday night, his campaign said they had nothing to do with the call.

"We don't know anything about such a call and certainly did not make it," said Ehrlich press secretary Andy Barth. "But we do condemn anything that could mislead voters or would depress turnout. We want an accurate, complete and fair election."

O’Malley was polling 10 points ahead of Ehrlich as of late October.

Polls close in Maryland at 8 p.m.

Sean Miller contributed to this report.