Report entitled "Auschwitz–Camp of Death" published by Natalia Zarembina, another Polish escapee; it is later published in English in 1943 (London) and March 1944 (New York).
Witold Pilecki, a Polish soldier, escapes. Witold's report is filed away by the British government with a note saying there was no indication as to the source's reliability. Jan Redzej and Edward Ciesielski escape with Pilecki and each compiles a separate report for the Polish Home Army.
Stanislaw Chybinski, a member of the Polish Home Army, escapes and compiles the report "Snapshots of Auschwitz".
Jerzy Tabeau (or Tabau) and Roman Cieliczko escape. They write a report in December 1943 and January 1944 that becomes known as the "Polish Major's report".
Kastner gives a copy of the report to Geza Soos, Hungarian Foreign Ministry official; Soos gives it to Joszef Elias; Elias's secretary translates it into Hungarian and prepares six copies for Hungarian officials.
Mass transports begin of Hungary's Jews to Auschwitz, at a rate of 12,000 a day.
Arnost Rosin, a Slovakian Jew, and Czesław Mordowicz, a Polish Jew, escape from Auschwitz. They write a report about the killing of Hungarian Jews.
The New York Times reports that a young Pole who escaped from Auschwitz described the gas chambers and said that Jews were being executed.
The BBC World Service reports that 4,000 Jews from the Theresienstadt concentration camp were killed in gas chambers at Auschwitz during March 1944. Rosin and Mordowicz (see 27 May) tell Oscar Krasniansky (see 27 April) that around 100,000 Hungarian Jews were killed on arrival at Auschwitz-Birkenau between 15 and 27 May, apparently with no knowledge of what was about to happen to them.
The Los Angeles Times repeats the BBC's information.
'The Washington Times Herald reports the same, courtesy of Reuters, while The New York Times offers further details. In Bratislava, Vrba discusses his report with Vatican legate Monsignor Mario Martilotti, who then sends a copy to the Vatican via Switzerland.
The New York Times reports that "new mass executions" recently took place in Auschwitz.