Athens, Greece (CNN) -- Three of the top four vote-getters in Sunday's parliamentary elections in Greece will meet Tuesday at the presidential palace to form a coalition government, an official with the socialist party Pasok told CNN. The official spoke not for attribution because the talks were at a critical juncture. "As wide as possible cooperation ... should happen at the latest tomorrow evening," said Evangelos Venizelos, head of the Pasok Party, which placed third. The center-right New Democracy Party took first place in the vote. Its candidate, Antonis Samaras, has three days to cobble together a government. "There should be government of national salvation with as many parties as possible," Samaras told reporters.
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Three of the top four vote-getters are to meet in the presidential palace
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Syriza party leader Alexis Tsipras says he will not attend
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Samaras, leader of center-right New Democracy, vows to put together a pro-euro coalition
Syriza
Alexis Tsipras, the leader of the leftist @placeholder party, which came in second, met with Samaras but said Monday he would not back a coalition.
Greece
Greece
"History and the people will judge them by their results," Tsipras said of the parties backing the existing bailout deal with the creditors who are keeping @placeholder afloat.
Antonis Samaras
Samaras
Samaras
The new government will have to make changes "in order for the Greek people to escape the torturous reality of unemployment and unbelievable difficulties that every Greek family faces today," @placeholder said after meeting with the president.