Polish politician Jaroslaw Kaczynski was questioned in Warsaw Tuesday in a probe into the April plane crash in Russia that claimed the life of his twin brother, president Lech Kaczynski, DPA reported
Kaczynski, head of the right-wing Law and Justice party, gave his testimony behind closed doors for some three hours.
Polish and Russian investigators are cooperating on two separate probes into the crash. Kaczynski took questions Tuesday from both Polish prosecutors and their Russian counterparts.
The April 10 plane crash in Smolensk, Russia, claimed the lives of 96 people.
Kaczynski was to describe events leading up to his brother's boarding the plane and what he saw at the scene of the crash when he travelled to Smolensk to identify his brother's body, Polish Radio quoted Kaczynski's lawyer as saying.
Kaczynski and his lawyers did not comment Tuesday on the questioning.
Kaczynski was the latest of several family members of the crash victims who have been questioned in the investigation