AKIPRESS.COM - The leader of Italy's biggest political party has called for the president to be impeached after he vetoed a choice for finance minister.

Luigi Di Maio of the populist Five Star Party said President Sergio Mattarella had caused an "institutional crisis", BBC reported.

Efforts by PM-designate Giuseppe Conte to form a government collapsed on Sunday after Mr Mattarella rejected eurosceptic candidate Paolo Savona.

Five Star had been trying to form a government with the right-wing League.

Italy has been without a government since elections in March because no political group can form a majority.

Mr Conte has now stepped down and correspondents say President Mattarella has been in talks with former IMF economist Carlo Cottarelli, who is tipped as a potential stop-gap prime minister.