Updated at 6:35 a.m. ETFormer French President Nicolas Sarkozy is being detained for questioning as part of an investigation looking into allegations that he took millions of euros from Libya to fund his 2007 election campaign.Police took Sarkozy into custody on Tuesday as part of investigation that began in 2013. He is being held at the Nanterre police station west of Paris while the questioning by French magistrates takes place, according to The Associated Press, quoting unnamed officials familiar with the case.France24 reports that Libyan officials linked to the regime of the late Moammar Gadhafi say they helped finance the 2007 campaign that swept Sarkozy, then leader of the Union for Popular Movement party, into the presidency. Sarkozy served as president until 2012.NPR's Eleanor Beardsley, reporting from Paris, says Sarkozy hasn't spoken publicly since he was taken into custody on Tuesday morning. "They can hold him for 48 hours and then he could be officially charged," depending on the strength of the evidence, she says. "But he has always vehemently denied" the allegations, Eleanor says.Although it is apparently the first time in the five-year probe that Sarkozy has been questioned specifically about Gadhafi, allegations of corruption have swirled around Sarkozy for years.As we reported, Sarkozy's home was searched in connection with possible illegal campaign funds accepted from France's wealthiest woman, L'Oreal heiress Liliane Bettencourt. The following year, Sarkozy seemed to have been cleared of those charges, but he was detained and questioned about them again in 2014, as NPR's Bill Chappell reported at the time.As NPR's Rebecca Hersher reported last year, Sarkozy also faces trial "... over the alleged falsifying of account records by his party in order to hide more than $20 million in overspending."The latest questioning comes three weeks after a former Sarkozy associate, Alexandre Djouhri, was arrested in London in connection with the investigation.France24 reports: