(see related stories on Italy's political situation) Brussels, March 4 - Italian politicians of all parties have a duty to ensure the stability of the eurozone, Eurogroup chief Jeroen Dijsselbloemof said Monday. "Each of the parties in Italian politics should contribute to the stability of the eurozone and respect the agreements that we have taken to secure the euro," said Dijsselbloem following a meeting Monday at which the Italian elections were discussed. He added that he hoped the anti-establishment Five Star Movement (M5S), which did well in last week's general election, did not speak for all Italians. The M5S now holds the balance of power in parliament after winning a total of 163 seats in both houses and stopping Pier Luigi Bersani's centre-left coalition gaining a working majority in the Senate. The leader of the M5S, Beppe Grillo, has said he wants to scrutinize every international treaty that Italy has signed and questioned whether the country should remain in the euro.