Rafael Grossi, head of the International Atomic Energy Agency (IAEA), said on Friday that the number of attacks on the Russian-controlled Zaporizhzhia nuclear power plant in Ukraine had increased, Russia's TASS state news agency reported.
Grossi was speaking after holding talks in Moscow with Alexei Likhachev, head of Russian nuclear corporation Rosatom.
Russian forces took control of the plant soon after the start of the war with Ukraine in 2022 and Moscow has said the Zaporizhzhia region, which it does not fully control, is now part of Russia, an assertion which Kyiv rejects.
Rosatom said in a statement after the Grossi-Likhachev talks that Ukraine was constantly carrying out attacks on Energodar, the closest town to the nuclear plant.
But Grossi was quoted by TASS as saying that it was impossible to determine which side was carrying out the attacks based on the examination of drone fragments.
"The small fragments of plastic or wood left by the alleged drones do not allow us to speak about the origin of these fragments. However, I would like to assure you that I am raising these issues at the highest level of international discussions," Grossi was cited as saying.
An explosion at a fireworks warehouse in Karachi, Pakistan's largest city, injured at least 34 people on Thursday, police said, causing panic among residents.
The Israeli military maintained its pressure on Gaza City with heavy bombardments overnight, residents said, ahead of a Thursday meeting between Prime Minister Benjamin Netanyahu and his ministers on plans to seize the enclave's largest city.
Russian President Vladimir Putin is prepared to meet Volodymyr Zelenskyy but all issues must be worked through first and there's a question about the Ukrainian leader's authority to sign a peace deal, Foreign Minister Sergei Lavrov said on Thursday.
United Nations Secretary-General Antonio Guterres on Thursday called for an immediate ceasefire in Gaza, after Israel announced the first steps of an operation to take over Gaza City.
Ukrainian President Volodymyr Zelenskyy said Kyiv would like a "strong reaction" from Washington if Russian President Vladimir Putin was not willing to sit down for a bilateral meeting with him.