The polling stations have closed.. and initial exit polls indicate that Poland's eurosceptic Law and Justice party has claimed its victory. Run by Jaroslaw Kaczynski, the twin brother a former Polish president, his party secured 39.1 percent of the vote. The tally is enough of a mandate to forego a coalition, coming in well ahead of the incumbent, who secured 23.4 percent of the vote, according to an Ipsos poll. Kaczynski was quick to declare his party's victory. (SOUNDBITE) (Polish) LAW AND JUSTICE LEADER, JAROSLAW KACZYNSKI, SAYING: "The law will be respected, we will pursue the truth. But no revenge, no negative emotions, no personal games or personal settling of scores. (There will be) no kicking of those who have fallen, even if they are responsible for their own fall and deserved it." Prime Minister Ewa Kopacz conceded the defeat. If the exit poll is correct, the eurosceptic party's win would be the biggest in terms of seats by a single party since Poland held free elections after abandoning communism in 1989. It would also mark a decisive swing to its brand of social conservativism mixed with left-leaning economics in the country of 38 million people.