AMSTERDAM, Netherlands — Ukrainian President Volodymyr Zelenskyy acknowledged that it is “not realistic” for his country to join the North Atlantic Treaty Organization (NATO) during the active war against Russia’s invasion, during a visit to the Netherlands on Thursday.

“We are realistic, we know that we will not be in NATO during the war,” Zelenskyy said at a press conference in The Hague. “But during the war, we want to get a very clear message that we will be in NATO after the war.”

Zelenskyy was speaking alongside Dutch Prime Minister Mark Rutte and Belgian Prime Minister Alexander De Croo.

Zelenskyy said he has received positive messages from some countries ahead of a planned NATO summit in July in Vilnius but that he still hopes to receive more concrete signals of support.

Rutte called the possibility of Ukraine joining NATO a “very sensitive” issue because of the ongoing war with Russia but said he backs Ukraine’s eventual membership in the Western defense alliance.

“We support Ukraine’s NATO ambitions,” said Rutte.

The Netherlands also said it is currently consulting with Denmark and Britain on the delivery of fighter jets to Ukraine.

The delivery of F-16 fighter jets is “not taboo,” said Rutte. An agreement has not yet been reached, but it was just a question of time, he added.

The prime minister referred to international debates on the delivery of howitzers and Leopard tanks to Ukraine. “These things take time. But now the self-propelled howitzers are in Ukraine. And the Leopard 2s are being delivered.”

The delivery of Western fighter jets to Ukraine has so far been controversial for both political and logistical reasons.

De Croo also announced a new military aid package for Ukraine but did not give details.

Later, Zelenskyy expressed his thanks to Dutch King Willem-Alexander for “the support in the defense of (Ukraine’s) freedom,” said Kyiv.

“Since the first days of the Russian attack, we have felt that the Netherlands and all Dutch people stand by Ukraine,” Zelenskyy was quoted as saying when he was received by the king, according to the presidential office in Kyiv.

Zelenskyy was then taken to an airbase with Rutte, where he met Ukrainian soldiers who are in the Netherlands for special training.

“Here and now we see what help is and what protection of life means,” Zelenskyy reportedly said.

Zelenskyy was shown the weapons and systems on which the Ukrainian soldiers are being trained.

“All this brings victory closer, our common victory. We will defeat Russian evil and protect our freedom, our common European way of life,” he said, according to Kyiv.

Earlier, while in The Hague, Zelenskyy also renewed his call for an international tribunal to prosecute Russian war crimes and aggression against his country after visiting the International Criminal Court (ICC).

Without justice, no peace is possible, Zelenskyy argued in his speech. He held up the trial of high-ranking Nazi leaders at Nuremberg after World War II as a model for how to deal with Russians implicated in atrocities in Ukraine.

“The sustainability of peace arises from complete justice toward the aggressor,” Zelenskyy said.

Zelenskyy praised the work of the ICC, which launched investigations shortly after the Russian invasion and in March issued an international arrest warrant for Russian President Vladimir Putin for alleged war crimes.

“Of course, we all want to see a different Vladimir here in The Hague today, the one who deserves to be sentenced for these criminal actions,” Zelenskyy joked at the beginning of his speech. Putin and Zelenskyy share versions of the same first name.

Zelenskyy expressed confidence that Putin would be brought to The Hague to be tried and punished after a Ukrainian victory in the war.

It is currently considered extremely unlikely that Putin would actually be extradited to The Hague to be tried by the ICC as Russia does not recognize the court.

Ukraine is also not officially a party to the ICC but has recognized the court’s jurisdiction since 2014 to prosecute war crimes and crimes against humanity committed on Ukrainian territory. In 2022, Ukrainian laws were amended to allow prosecutors from The Hague to conduct investigations in Ukraine.

The Ukrainian president visited the ICC earlier in his unannounced trip to the Netherlands, before meeting with the Dutch and Belgian leaders.

Zelenskyy was welcomed by the Dutch parliament and also spoke with lawmakers.

The Netherlands has so far provided around €1.2 billion ($1.3 billion) in military aid to Ukraine in its fight against the Russian invasion.