Jarosław Kaczyński, the Law and Justice (PiS) leader and twin brother of former President Lech Kaczyński, has appealed to EU authorities to investigate the April 10, 2010 Smolensk airplane catastrophe.

He has suggested that foul play helped cause the incident, which claimed the lives of 96 people, including Lech Kaczyński.

He even implied that the Polish government could have been involved in helping to kill his brother.

“If there were explosions, if this catastrophe is starting to look more and more like an assassination, then we have a new era in politics. And tolerating this era could cost us very much,” said Mr Kaczyński in a conference call with Brussels.

Mr Kaczyński also questioned the Polish government's reaction to the plane crash.

“How did the foreign minister [Radosław Sikorski] know just a few minutes after 9 AM that everybody had died? And a few minutes later he already knew it was as a result of pilot error,” said the PiS leader, adding that there was a “propaganda campaign” surrounding the crash, which had been “planned earlier.”