Ukraine accused Moscow on Tuesday of attempting to drag Moldova’s breakaway region of Transdniestria into its war with Kyiv, after authorities in the Moscow-backed region claimed a series of attacks.

Transdniestria, an unrecognized sliver of land bordering southwestern Ukraine, said explosions had damaged two radio masts broadcasting in Russian and that one of its military units had been attacked.

It gave few details but blamed Ukraine, raising its “terrorist” threat level to red and installing checkpoints around its towns.

The Kremlin, which has troops and peacekeepers in the region, expressed grave concern.

Ukraine is concerned that the region will be used as a launch pad for new attacks. President Volodymyr Zelenskiy blamed Moscow, claiming that Russia was showing Moldova what to expect if it continued to back Kyiv.

“We have seen that the Russian Federation is planning another step… it is clear why, really, to destabilize the situation in the region,” he said at a news conference with the visiting head of the International Atomic Energy Agency.

Moldova, which is wary of any signs of deteriorating security in the enclave, convened an emergency security council meeting in response to the reports.