In August 1968, the Soviet Union invaded Czechoslovakia to crush the liberalising reforms of Alexander Dubček's government during what was known as the Prague Spring. Prague-born Palach decided to sacrifice himself in protest of the invasion and set himself on fire, in Wenceslas Square, on 16 January 1969. According to a letter he sent to several public figures, an entire clandestine resistance organization had been established with the purpose of practising self-immolation until their demands were met; however, it seems that such a group never existed. The demands declared in the letter were the abolition of censorship and a halt to the distribution of "Zprávy", the official newspaper of the Soviet occupying forces. In addition, the letter called for the Czech and the Slovak peoples to go on a general strike in support of these demands. An earlier draft of the letter that Palach wrote also called for the resignation of a number of pro-Soviet politicians, but that demand did not make it into the final version, which included the remark that "our demands are not extreme, on the contrary". Palach died from his burns several days after his act, at the hospital. On his deathbed, he was visited by a female acquaintance from his college and by a student leader, to whom he had addressed one of the copies of his letter. It was reported that he had pleaded for others not to do what he had done but instead to continue the struggle by other means, although it has been doubted whether he really said that.