Ukrainians and Lemkos have been in the [Central Labor Camp] of the COP since its inception (on May 1, 1945, 43 of them were counted among 2314 prisoners), but only the decision of the Political Bureau of the Central Committee of the Polish Workers' Party of April 23, 1947 to send Lemkos and Ukrainians resettled from their lands there who were suspected of collaborating with or sympathizing with the OUN and UPA, significantly increased their number in the camp.
The first transport with prisoners arrived on May 4, 1947 from Sanok, it consisted of 16 people from the Lesko and Sanok poviats, and the person entered in the camp book number 1 was Maria Baran from the Lesko poviat. Later transports came from Oświęcim, through which all the displaced persons were transported to the Western Territories.
There were 3,873 prisoners in this camp (2,781 Ukrainians — including 823 women, 22 Greek Catholic priests, 5 Orthodox priests), 162 of whom died. The largest group were prisoners who were sent to the camp after several days in poviat arrests, they were transported directly to Jaworzno, but a large group were also people who were caught from transports to the Western Territories on the basis of lists previously prepared by local officers with suspects of cooperation or sympathizing with the UPA. The camp also included the Lemkos intelligentsia who had previously avoided arrests.
Dozens of people were also taken to the camp, captured while trying to return to their homeland, which was also a pretext for the authorities to send them to Jaworzno (secret order No. 0010 of the commander of GO „Wisła”, General Stefan Mossor).
During their stay in Jaworzno, the camp authorities often used psychological and physical terror against the prisoners. The prisoners were employed in the camp, among others, in the construction of the Jaworzno power plant and in sewing clothes for the needs of the Ministry of Public Security. One of the women, 25‑year‑old Katarzyna Koprek, was tortured in such a way by a Polish block member called 'Marysia' or 'Black Block–head', she threw herself out of despair on the camp wires. At that time, all prisoners were driven out of the barracks, who were shown her charred body hanging on wires as a warning. Her torturer, 'Marysia', always had an elegant hairstyle, and also wore a tailor–made uniform. She loved to torture women with the whip she always walked with. Although her name appears in the files of the camp employees and she lived in Jaworzno until the end, the IPN prosecutors conducting the investigation failed to find and question her.
There was also a special torture chamber, in which several security officers beat the interrogators with thick electric cables or wooden clubs, electrocuted them, stuck his nails under his fingernails or placed a stool on the stool's leg.
The last prisoners who were brought to the camp on May 22, 1948 from Koszyce were 112 UPA soldiers, who were captured in Czechoslovakia while crossing to the West, but after a two–day stay, they were transported to the prison on Montelupich Street in Krakow.
From the spring of 1948, prisoners were gradually released, except for clergy, who were held until February 15, 1949, and then transported to the prison in Grudziądz. Officially, the sub–camp for the Ukrainian and Lemko people was closed on January 8, 1949.

source: „Central Labour Camp in Jaworzno”; in: portal: WikipediA — web page: pl.wikipedia.org [accessible: 2020.03.15]

Polish translation of the information by Myron Łozowski about the murder of Ukrainians in the village of Łazy, included in the collection „Jarosław and Beyond the San river regions” from 1986:
„Not all inhabitants of Łagów reached the Recovered Territories happily. In particular, the fate of the 21 people who were arrested by the Polish political police on June 3, 1947 as particularly dangerous for Poland is unknown. Together with hundreds of other Ukrainians arrested in the Jarosław, Ciechanów and Lubaczów regions and UPA prisoners, they were imprisoned in a concentration camp in Jaworzno near Katowice, where almost all of them died in torment. Among them were: Wasyl Kindra, Teodor Workun, s. Jacek, Mychajło Koziak and Maria Pryśko. There is no news of the others arrested at that time to this day”.

source: „Łazy”; in: Siwicki M., „The history of Polish-Ukrainian conflicts ”, in: Warszawa 1994, vol. III, p. 233—236

source: Huk Bogdan with a group of friends, „Murders of the Ukrainian population 1944-1947”; in: portal: Ruthenian apocrypha — web page: www.apokryfruski.org [accessible: 2021.09.30]