Russia denies its drone targeted Chernobyl nuclear power plant in Ukraine

Driving the news: The IAEA said Friday that an explosion was heard at the plant overnight at the containment structure over the plant's reactor 4 — the site of the 1986 disaster — causing a fire.

• While the IAEA didn't attribute blame for the strike, Ukrainian President Volodymyr Zelensky said the strike was caused by a Russian drone that caused "significant" damage.
• "The only country in the world that attacks such sites, occupies nuclear power plants, and wages war without any regard for the consequences is today's Russia. This is a terrorist threat to the entire world," he wrote.
• Both Zelensky and the IAEA said radiation levels in the area remain normal.

The other side: Kremlin spokesman Dmitry Peskov denied the accusations that it was behind the attack, telling reporters Friday it was a "fabrication," Russian state news agency TASS reported.

• "The Russian military does not do this," he added.

The big picture: Throughout the war, which is set to enter its fourth year later this month, Ukraine has accused Russia of risking a nuclear incident.

• Russian forces briefly occupied the Chernobyl plant at the start of the war and fighting around the Zaporizhzhia Nuclear Power Station triggered warnings of possible nuclear disaster.

Go deeper: Putin ramps up nuclear threats over Ukraine strikes