Russian warplanes hit Ukraine again on Thursday, smashing into apartment buildings, energy infrastructure, and an industrial site.

Authorities said at least four people were killed and five others were wounded in drone and missile strikes.

Also, the U.N.. The Secretary-General announced an extension of a four-month-old deal to ensure the safe delivery of goods from Ukraine through the Black Sea just days before it was set to expire.

The UN is committed to removing obstacles that impeded the export of food and fertilizer from Russia, which is one of two agreements that were struck between the two countries and Turkey in July. The deals signed in Istanbul aim to bring down the price of food and help avoid a food crisis.

Kyiv’s military command said that its air defenses had shot down two or more cruise missiles and five or more Iranian-made exploding drones.

In a recent move to protect its energy assets, Russia has increasingly resorted to aerial bombardments in recent weeks, as its military continues to be pushed back in parts of Eastern Ukraine.

Analysts say that the Ukrainian air defenses appear to have had higher success rates this week than they did last month. Part of the improvement results from Western-supplied air defense systems.

Missiles and drones are still able to get through.

Russian strikes hit Ukraine’s southern Odesa region and the city of Dnipro for the first time in weeks on Thursday morning, and air raid sirens sounded across the country. An infrastructure target was hit.

Maksym Marchenko said on Telegram that there was a threat of a massive missile barrage.

Multiple explosions were reported in Dnipro, where two infrastructure objects were damaged and at least one person was wounded.

There are air defense systems in the central region. Oleksiy Kuleba said. Two missiles were shot down over the city.

Residents in the Poltava, Kharkiv, Khmelnytskyi and Rivne regions were urged to stay in bomb shelters because of the continued threat of missile strikes.

On Tuesday, the biggest attack to date on Ukraine’s energy infrastructure resulted in a missile hitting Poland, and on Thursday, there was another blast. As battlefield losses mount, Russia has begun targeting the power grid in Ukraine.

The retaking of the southern city of Kherson by the Ukrainian military last week sparked days of euphoria in the country.

In a Telegram post on Thursday, the head of Ukraine’s presidential office called the strikes on energy targets naive and said that they did not lead to results.

Ukrainian President Volodymyr Zelenskyy said he expected the renewal of the United Nations to last at least 120 days.

A Turkish-brokered deal has enabled Ukraine to export over 11 million metric tons of wheat and Russia to ship its grain and fertilizer to world markets.

The deal will be extended for 120 days, according to Zelenskyy, who characterized it as a key decision in the fight against the food crisis.

Turkish officials wouldn’t confirm it, but they did say that negotiations for the extension of the grain initiative are continuing and that an announcement will be made when the talks are concluded.

The United Nations has previously stated that it is cautiously optimistic that the deal will be renewed. Millions of people in developing countries were unable to buy enough to eat because of the food shortages and high prices caused by the Russian invasion of Ukraine.

Russia is a member state of the U.N. Ambassador complained last month that there was more that could be done. The deal brokered by the United Nations and Turkey with Russia and Ukraine will be extended for another 120 days if either Moscow or Kyiv objects.

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