Rabbi who backed Abramovich's citizenship banned from leaving Portugal

Chelsea's owner Roman Abramovich, center, applauds after Chelsea were presented with the Premier League trophy after their English Premier League soccer match against Sunderland at Stamford Bridge stadium in London, May 24, 2015. AP

A rabbi responsible for the certification that allowed Russian billionaire Roman Abramovich and others to obtain Portuguese citizenship is not allowed to leave the country and must present himself to authorities when required, Lusa news agency said on Saturday.

Officers of the Judicial Police, the national criminal investigation agency, detained rabbi Daniel Litvak on Thursday as part of an ongoing public prosecutors inquiry into how Chelsea soccer club owner Abramovich was granted citizenship.