Jaroslaw Kaczynski, the twin brother of the Polish president killed in a plane crash earlier this month, will be a candidate to succeed him, his party announced Monday.

Poland will hold elections on June 20 to elect a successor to Lech Kaczynski, who died April 10, along with 95 others including his wife and many top military leaders and officials.

Acting President Bronislaw Komorowski has also said he will be a candidate.