Head of the Ministry of Foreign Affairs in the Netherlands Stephanus Blok explained in the letter to the President of Ukraine that the captives exchange between Russia and Ukraine was postponed at the request for the Netherlands government to give Dutch officers to question Tsemakh

Detectives of the Public Prosecutor's Office of the Netherlands interviewed the suspected in MH17 case Vladimir Tsemakh in Ukraine before sending him to Moscow. Nos reported that referring to the open letter of Ministry of Foreign Affairs Head Stephanus Blok addressed to the country's President and the Parliament.

"The exchange was postponed at the Netherlands' request to give a possibility for Dutch detectives to reinterview Tsemakh. And this has happened," the letter reads.

Tsemakh was the commander of pro-Russian separatists and was released in Ukraine on Thursday.

MH17 witness and suspect Vladimir Tsemakh disembarks in Moscow after being released from custody by a Ukrainian court. Hopefully those claiming reports he was being swapped were fake news or Russian propaganda will apologise. pic.twitter.com/6su1uzHNSM — Eliot Higgins (@EliotHiggins) September 7, 2019

As it became known later, Tsemakh was pardoned by Volodymyr Zelensky and included into the excnahge list. The captives swap "35 on 35" between Moscow and Kyiv happened yesterday.