Russian President Vladimir Putin has visited the occupied port city of Mariupol, Russian state news agencies reported on Sunday morning, in his first trip to the Ukrainian territory that Moscow illegally annexed in September.

Mariupol became a worldwide symbol of defiance after outgunned and outmanned Ukrainian forces held out in a steel mill there for nearly three months before Moscow finally took control of it in May.

Earlier, on Saturday, Putin traveled to Crimea, a short distance southwest of Mariupol, to mark the ninth anniversary of the Black Sea peninsula’s annexation from Ukraine.

The visits came days after the International Criminal Court issued an arrest warrant for the Russian leader accusing him of war crimes.

Putin arrived in Mariupol by helicopter and then drove himself around the city’s “memorial sites,” concert hall and coastline, the Russian reports said, without specifying exactly when the visit took place. They said Putin also met with local residents in the city’s Nevskyi district.

Russia annexed Crimea from Ukraine in 2014, a move that most of the world denounced as illegal, and moved on last September to officially claim four regions in Ukraine’s south and east as Russian territory, following referendums that Kyiv and the West described as a sham.