© Agencja Gazeta/ReutersPoland's prime minister Donald Tusk celebrates the election results.
Donald Tusk looks to have won a historic second term as prime minister of Poland, with his Civic Platform becoming the first party to win two consecutive terms since the collapse of communism.
Full official results are not expected until Tuesday, but with 93% of the votes counted, Tusk's free market party had 39% of the votes in Sunday's election. Its main rival, Jaroslaw Kaczynski's Eurosceptic nationalist-conservative Law and Justice party (PiS), trailed on 30%.
Markets reacted positively to the news, with Polish shares and the zloty up.
On current projections, Civic Platformwould secure 206 seats in the 460-member lower chamber, or Sejm. It also won a clear victory in the upper chamber, or senate, where it was set to win 62 of the 100 seats.
Its ally, the rural-focused Peasants' party, was on track to win 30 seats, giving Tusk enough support to rebuild the same coalition that has steered Poland smoothly through the economic turmoil of the past four years. The two parties enjoyed a drama-free relationship, at least in public, that added to the government's stable image.