BEIJING, July 17 (Xinhuanet) -- U.S. Republican Sen. David Vitter, who admitted to "serious sin" after he was linked last week to a Washington escort service, on Monday apologized again for the sex scandal, but showed no intentions of resigning.

In a news conference in Metarie, a New Orleans suburb, with his wife, Wendy, by his side, Vitter offered an apology to "all those I have disappointed and let down with the actions of my past." 

However, he said allegations that he visited other prostitutes in Louisiana are "not true," and he would go back to work in Washington this week.

"Unfortunately, my admission has encouraged some long-time political enemies and those profiting from the situation to spread falsehoods," Vitter said. "Those stories are not true."

Vitter said that he and his wife had dealt with his past problems years ago and that she forgave him. If his opponents wished to use his past wrongdoings to attack statements that he had made, "so be it," he said.

On July 9, Vitter apologized for committing "a very serious sin in my past" after his number turned up in telephone records of an escort service run by Deborah Jeane Palfrey, the "D.C. Madam" who is accused of running a prostitution ring in Washington, according to media reports.

Telephone records show that the Washington service called Vitter's number five times from 1999 to 2001, while he was a U.S. representative.

During the past week, former New Orleans madam Jeanette Maier said Vitter was a customer at her Canal Street bordello in the late 1990s, and another woman identified as Wendy Cortez told the New Orleans paper Vitter had been her regular client several years ago, media reported.

The allegations have stunned many in Louisiana because Vitter, a Harvard graduate and Rhodes scholar, has been a highly visible social conservative who championed family values and ardently opposed abortion and gay marriage.