Rebels from Greece’s Syriza party said Friday they will form a new parliamentary group, a day after Prime Minister Alexis Tsipras resigned and triggered snap elections. At least 25 Syriza rebels will join the new party, named Popular Unity, as Greece launched into a bit of political horse trading ahead of elections likely to be held in a month’s time. “In line with our electoral pledges, we are departing from the parliamentary group we formerly belonged to and are forming a new independent parliamentary group,” the eurosceptic rebels headed by by ex-Communist former minister Panagiotis Lafazanis said in a statement. Syriza was deeply divided over Athens acceptance of a mammoth 86-billion-euro bailout package finally agreed with international creditors last month, the third for Greece in five years. Tsipras handed his resignation late Thursday to President Prokopis Pavlopoulous, who then asked Evangelos Meimarakis, head of the main opposition conservative New Democracy party to form a coalition. According to the constitution, following the resignation of the premier, the president must give a three day exploratory mandate to each of the three largest parties in parliament to see if they are able to form a coalition government. If they fail, the president must organise early elections.