This is getting worse by the day.

Secret Service probing foreign hard-partying allegations going back to 2000

(CBS News) WASHINGTON - The Secret Service sex scandal is getting wider.

The dispute over payment to a prostitute in Cartagena, Colombia, by a Secret Service agent has triggered new charges of hard partying and impropriety by agents around the globe.

Two weeks after the incident in Cartagena, the Secret Service is working to quickly wrap up that portion of the scandal, but the U.S. government is investigating reports of unprofessional behavior and rule-breaking by agents in four countries, going back 12 years.

On Capitol Hill, there are growing demands for an outside agency to take over the probe.

Seattle CBS affiliate KIRO-TV reported Thursday that Secret Service agents visited a strip club in El Salvador — by the vanload — in advance of President Obama’s trip there in March 2011.

The Secret Service is looking into that report and some others, including accusations that Secret Service personnel traveling in 2009 with former President Clinton partied at strip clubs on a visit to Buenos Aires, Argentina, and that agents and White House staffers went to a Moscow night club known for its sexually charged atmosphere prior to Mr. Clinton’s trip to Russia in 2000.

The new allegations come soon after a hearing Wednesday in which senators were assured that the Colombia scandal was an isolated incident.