A spokesman for Poland's top prosecutors says the remains of President Lech Kaczynski, his wife and other victims of a 2010 plane crash will be exhumed to help investigators determine the cause of the crash that killed 96 people.

Prosecutor Maciej Kujawski told The Associated Press on Wednesday that investigators are in talks with Polish and foreign experts who they want to carry out the exhumations at an unspecified time.

He said the post-mortem documents that Poland received from Russia, where the crash occurred, are incomplete and in some cases erroneous and don't help explain the reason of the crash that is under a renewed investigation in Poland.

The exhumation decision was taken Tuesday during a meeting with the families of some of the victims.