Mexico union leader Elba Esther Gordillo arrested
27 February 2013 Last updated at 11:54 GMT
Union head Elba Esther Gordillo, known as Mexico's most powerful woman, has been arrested on corruption charges.
Ms Gordillo, who runs the 1.5 million-member Mexican teachers' union, is alleged to have embezzled more than $156m from union funds.
No-one from her legal team has responded to the allegations, but in the past she has denied any wrongdoing.
Mexico's Attorney General, Jesus Murillo Karam, gave details of the arrest to reporters.