Warsaw, 26 March 1949. A member of the Main Commission for the Investigation of German Crimes in Poland, Norbert Szuman (MA), heard the person named below as an unsworn witness. Having been advised of the criminal liability for making false declarations, the witness testified as follows:
| Name and surname | Irena Klein, née Kornarzewska |
| Date and place of birth | 18 January 1904 in Warsaw |
| Names of parents | Adam and Stefania, née Mysior |
| Occupation of the father | office worker |
| State affiliation and nationality | Polish |
| Religious affiliation | Roman Catholic |
| Education | secondary |
| Occupation | office worker in the Sejm [Polish parliament] |
| Place of residence | Warsaw, Puławska Street 83, flat 7 |
| Criminal record | none |
When the Warsaw Uprising broke out, I was in the house at Puławska Street 83. From 1 August 1944, the area of our house was in the hands of insurgents. Puławska Street was blocked at the level of Dolna Street with a barricade which the Germans could not cross.
On 18 August, my son Zbigniew Waldemar (born on 18 January 1927), and who currently lives with me, was wounded. When his wound had been dressed in the First Municipal Health Center, he was transferred to the Hospital of the Sisters of Saint Elizabeth.
In the last days of August, I moved my son to the first-aid post at Malczewskiego Street 16 or 18, from where I took him in September to my house at Puławska Street 83. On the day of the surrender of Mokotów I transferred my son to the first-aid post in the First Municipal Health Center, run by Dr. Stypułkowski. On the day of the surrender of Mokotów, the Center looked as follows: in the basement there was a hospital for people with infectious diseases with up to ten patients, and on the ground floor, in three or four little rooms, there were 10–15 wounded people, including my son. Apart from that, at the same time, i.e. on the day of surrender, a certain number of civilians, wounded people and a dozen or so non-uniformed insurgents were hiding in a shelter situated between Puławska Street and the building of the center. At one point, it was about 10.00 p.m., I heard a noise – I learned from one of the female paramedics that the Germans were forcing out the medical and nursing staff. A moment later my son told me that the building was on fire. I rushed outside and noticed that some incendiary shells were hitting the house. I took my son out of the burning center, where infectious patients were in the basement and the wounded people, as I have already mentioned, on the ground floor, and I moved him to the shelter. In that part of the shelter into which I brought my son, there were if I am not mistaken, a few hundred people, including wounded people and a dozen or so non-uniformed insurgents. Despite my calls, nobody wanted to help me take out the sick and the wounded from the burning center. They burned alive; I heard them screaming and begging for help. I think that a dozen or so people burnt there.
We left the shelter at dawn of the following day. A German soldier was standing in front of it, and he picked three or four young men from among the crowd. Another German soldier took them round the corner of the burning house. A moment later I heard a short salvo and the boys did not come back to us. People from the shelter went along Puławska Street in the direction of Służewiec. I took my son and two little children on a vegetable cart. When I found myself level with Dreszera park, some German officer took a photograph of me and my son who was in the cart. Next to the park, as I saw, the Germans were setting fire to the neighboring buildings, having first looted them.
I went to Malczewskiego Street, planning to place my son in the first-aid post which was located there at number 16 or 18, but I learned from one of the femalemedics that the German doctors had announced the deportation of the wounded people to Pruszków. Indeed, a truck was standing in front of the post, and a few sick and wounded people, and my son and I were put in it.
The car took us to the area of the race tracks in Służewiec, and from there we were transported to Pruszków.
At this point, the report was concluded and read out.
Witness Irena Klein appears again before the Commission and, pointing to the instruction on the criminal liability for making false declarations and my summons which has just been described on page 3 of this report, the witness states that according to the words of a Polish nurse who worked in the center for sick and wounded people at Puławska Street 91, the Poles gathered there did not want to help the witness rescue the sick and wounded people from the burning house because the Germans threatened them –at the time when the witness was busy saving her son .Due to that action of hers all people gathered in the shelter by the hospital would be executed should they undertake to rescue the sick and wounded people.