Polish President Lech Kaczynski was killed early Saturday along with his wife, several top military officials, and the head of the national bank when their plane crashed at a western Russian airport, officials said.
"There are no survivors," said Sergey Antufyev, the governor of Smolensk, where the plane was trying to land when it crashed.
A spokesman for Poland's Foreign Ministry, Piotr Paszkowski, said earlier that it was probable that everyone on board was killed.
The Polish military plane originated in Warsaw, the Polish Defense Ministry said. It was approaching the airport at Smolensk -- just a few miles east of Katyn -- and probably hit some trees at the end of the runway, Paszkowski said.
The Investigation Committee of the Russian prosecutor's office said the plane, a Tupolev-154, was trying to land in heavy fog.
Kaczynski's Law and Justice Party released a list of some of those it said were killed in the crash. They included Aleksander Szczyglo, the head of the National Security Office; Jerzy Szmajdzinski, the deputy parliament speaker; Andrzej Kremer, the deputy foreign minister; and Gen. Franciszek Gagor, the army chief of staff, according to the party.
"The entire top military brass, including the chief of defense and all the services, were on the plane," said Tomas Valasek, of the Center for European Reform. "If that is true, then you're looking at a situation, in effect, of the decapitation of the military services."
