By June 1942 the main producer of gas vans, Gaubschat Fahrzeugwerke GmbH, had delivered 20 gas vans in two models (for 30–50 and 70–100 individuals) to Einsatzgruppen, out of 30 that were ordered from that company. Not one gas van was extant at the end of the war. The existence of gas vans first came to light in 1943 during the trial of Nazi collaborators who had been involved in the gassing of 6,700 civilians in Krasnodar.[citation needed] The total number of gas van gassings is unknown.[16]