Published: Jun 21, 2010 1:27 AM EDT
Updated: Jun 20, 2010 10:28 PM EDT

WARSAW, Poland (AP) - A somber election season in Poland has been prolonged by two weeks.
      
A first round of voting has produced no immediate successor to Lech Kaczynski, the president killed more than two months ago in a plane crash.
      
Results show the interim president and parliament speaker, Bronislaw Komorowski, is leading Kaczynski's identical twin, Jaroslaw Kaczynski. But Komorowski appears to have fallen short of the 50 percent needed for outright victory.
      
The two leaders must now go head-to-head in a runoff vote on July 4, without eight other candidates who ran Sunday.
      
Kaczynski, 61, addressing supporters Sunday evening, made a rare reference to the plane crash that killed his brother, noting that the campaign has been anything but normal. He said "it's an election which is the result of a huge catastrophe, a huge misfortune, a huge tragedy."