(CNN) -- Pilots were warned of potential danger at least eight times in about 30 seconds before a Polish jet crashed in Russia in April, killing President Lech Kaczynski and about 100 others. 

A transcript that the Polish government released Tuesday shows that an automated warning system sounded the alarm several times before the Tupolev-154 crashed in western Russia. 

"Pull up. Pull up," a warning system advised pilots. "Terrain ahead. Terrain ahead." 

The April 10 crash killed Kaczynski, his wife, top Polish military officials, the head of Poland's national bank and other dignitaries. 

The president had been traveling with a Polish delegation to Russia for the 70th anniversary of the massacre of Polish prisoners of war in the village of Katyn. Some 20,000 Polish officers were executed there during World War II.
When was the crash that killed the Polish President? What president was killed in the crash? Where is the delegation headed to? On what day did the crash occur? When did the plane crash? People on the crashed plane were heading were? Who was warned of danger? What does the transcript show? What did the transcript show?
April,
Lech Kaczynski
Russia
The April 10
April,
Russia
Pilots
an automated warning system sounded the alarm several times before the Tupolev-154 crashed in western Russia.
an automated warning system sounded the alarm several times
Transcript shows pilots warned of danger several times in seconds before crash .
April 10 crash killed Polish President Lech Kaczynski and about 100 others .
Delegation headed to Russia for 70th anniversary of massacre of Polish prisoners of war in World War II .