At this time the governments of Austria and Russia tried to use the Polish question as a political weapon. Sierpinski was interned in Viatka. However Egorov and Luzin heard that he had been interned and arranged for him to be allowed to go to Moscow. Sierpinski spent the rest of the war years in Moscow working with Luzin .
Sa oras na ito ang mga pamahalaan ng Austria at Russia tried na gamitin ang Polish katanungan bilang isang pampulitikang sandata. Sierpinski ay interned sa Viatka. Subalit Egorov at Luzin narinig na niya na interned at inayos para sa kanya upang maging pinahihintulutan na pumunta sa Moscow. Sierpinski nagastos ang magpahinga ng ang digmaan taon sa Moscow nagtatrabaho sa Luzin.