Ukraine hints at involvement in another Crimea explosion roiling Russia

Explosions rocked an ammunition depot and disrupted trains in Russian-annexed Crimea on Tuesday, the latest such incident in a region Moscow uses as a supply line for its war in Ukraine.

Kyiv hinted at involvement which, if true, could show new capability to strike deeper into Russian-held territory, potentially changing the dynamic of the six-month conflict.

Calling the incident "sabotage," Moscow confirmed that two people were wounded, railway traffic had been halted and about 2,000 people in a nearby village evacuated.

The Crimean Peninsula on the Black Sea, which Russia seized from Ukraine in 2014 in a move unrecognized by most countries, is the base of Russia's Black Sea Fleet and popular in the summer as a holiday resort.

Last week, blasts at another military airbase on Crimea's western coast caused extensive damage and destroyed several Russian war planes.

In Tuesday's incident, an electricity substation also caught fire near the town of Dzhankoi in north Crimea, according to footage on Russian state TV. It showed explosions on the horizon which authorities said came from the ammunition detonations.

Russia's RIA news agency said seven passenger trains had been delayed and that rail traffic on part of the line in northern Crimea had been suspended. That could disrupt its ability to support troops in Ukraine with military hardware.

Ukraine has not officially confirmed or denied responsibility for explosions in Crimea, though its officials have openly cheered incidents in territory that, until last week, appeared safe in Moscow's grip beyond range of attack.

After Tuesday's new blasts, Ukrainian presidential adviser Mykhailo Podolyak and chief of staff Andriy Yermak both exulted on social media at "demilitarization:" an apparent mocking reference to the word Russia uses to justify its invasion.

"A reminder: Crimea [as a] normal country is about the Black Sea, mountains, recreation and tourism, but Crimea occupied by Russians is about warehouse explosions and high risk of death for invaders and thieves. Demilitarization in action," tweeted Podolyak.

"Operation 'demilitarization' in the precise style of the Armed Forces of Ukraine will continue until the complete de-occupation of Ukraine's territories," Yermak wrote on Telegram.

In another incident on Tuesday, plumes of smoke were seen at a Russian military airbase near the settlement of Hvardiyske in central Crimea, Russia's Kommersant newspaper reported.

Kyiv aims to disrupt Russian supply lines ahead of a planned Ukrainian counter-attack.

Russia's Crimean bases are mainly out of range of the main rockets Western countries acknowledge giving Ukraine, raising the prospect that it has acquired new capability.