The plane was flying from Warsaw to mark the 70th anniversary of the Katyn massacre.
European Commission President Donald Tusk testifies in Warsaw about the disaster which killed 96 including then-President Lech Kaczynski. Tusk was Prime Minister at the time. He is locked in disputes with Law and Justice over the crash.
Law and Justice's Jarosław Kaczyński, twin brother of ex-President Lech, calls off Marches of Remembrance held in Warsaw every month since the disaster, saying they are not needed owing to the new monument.
Polish officials say 6,000 Polish zloty were withdrawn using credit cards stolen from a passenger killed in the 2010 Polish Air Force Tu-154 crash near Smolensk. Poland says four soldiers have been arrested, while Russia denies this.
The body of Poland's First Lady, Maria Kaczyńska, is flown to Warsaw to lie in state alongside that of her husband, President Lech Kaczyński. Poland has seen an outpouring of grief since the couple and scores of other senior Polish officials died in a plane crash in western Russia on Saturday.
Polish President Lech Kaczyński lies in state in Warsaw as Russia marks a day of mourning and Poland appoints an acting head of the central bank to replace the one killed in Saturday's air disaster near Smolensk.