President Volodymyr Zelenskiy said on Wednesday that Russia had responded to Ukraine’s proposed Easter ceasefire by launching more strikes against his country’s energy infrastructure.

“Russia responds with ‘Shaheds’ (Iranian-designed drones) and continues its terrorist operations against our energy sector, against our infrastructure,” Zelenskiy said in his nightly video address, adding he had discussed ways of advancing diplomacy in talks with U.S. negotiators.

“Other signals are needed, and a silence over Easter could be exactly the signal that tells everyone that diplomacy can be successful.”