He wrote about it on Twitter.
"Today I am returning to Kyiv. We will stand with Ukraine and its people until peace returns to Europe," he emphasized.
According to Suspilne, Ukraine's Deputy Foreign Minister Yevhen Perebyinis greeted Sanchez at the Kyiv railway station.
Spanish Prime Minister will meet with President Volodymyr Zelenskyy, visit Irpin and Bucha.
Earlier, Spanish mass media announced his visit to Ukraine.