Kiev (Ukraine) (AFP) - A drone attack blamed on Ukrainian forces on Saturday targeted the headquarters of Russia's Black Sea fleet, a day after the Pentagon announced new $775 million in military aid to Kiev aimed at turning the tide of fighting.

The attack took place on Saturday in Sebastopol, without causing any injuries, according to the governor of the city located in the Crimean peninsula, Mikhail Razvozgaev.

"The drone was shot down over the headquarters of the fleet, fell on the roof and caught fire," Razvozgaev said in a message via Telegram.

The accident did not cause "extreme damage" or injuries, according to what the governor said, holding the Ukrainian forces responsible for the operation.

It was the second attack targeting the headquarters of the Russian Black Sea Fleet in Sebastopol in less than a month.

It comes after the Pentagon announced on Friday a new $775 million military aid package for Ukraine, with the aim of helping Kiev reverse the equation on the ground and restore the lands occupied by Russian forces since the invasion began on February 24.

A senior Pentagon official told reporters that the new aid includes precision missiles, anti-tank weapons, reconnaissance drones, artillery and mine-clearing equipment, which could augment Ukrainian attacks.

"You see a complete and complete lack of Russian progress on the battlefield," said the official, who requested anonymity.

This 19th package of aid since the start of the war comes at a time when the battles show the Ukrainian forces' use of precision guided weapons supplied by the allies with the aim of carrying out strikes in remote locations behind enemy lines, in addition to their destruction of dozens of weapons depots and Russian command centers since mid-June.

Recently, a Russian airport and other facilities deep in Crimea were severely damaged. This week, a weapons depot exploded about 50 kilometers (30 miles) inside the Russian province of Belgorod.

The new aid package includes HIMARS missiles, which the Ukrainians are using to strike Russian weapons depots, and air-to-surface Harm anti-radar missiles.

It also includes 15 Sky Eagle reconnaissance drones, 1,000 Javelin anti-tank missiles, 1,500 TOW missiles, and new artillery with ammunition.

On the other hand, Russian President Vladimir Putin agreed on Friday that the International Atomic Energy Agency (IAEA) send a mission to Ukraine's Zaporizhia nuclear plant, the largest in Europe.

"The systematic bombing of the area of the Zaporizhia nuclear power plant raises the risk of a large-scale catastrophe that could lead to radioactive contamination of vast areas," Putin warned, during a phone call with his French counterpart, Emmanuel Macron.

The two presidents stressed "the importance of sending a mission of the International Atomic Energy Agency to the nuclear plant as soon as possible, to assess the situation on the ground," according to what the Kremlin confirmed, pointing out that "the Russian side confirmed its readiness to provide all necessary support to the agency's inspectors."

At the same time, the Secretary-General of the United Nations, Antonio Guterres, called on Russia on Friday, during a visit to Ukraine, not to cut off the Zaporizhia station, which it controls in the south of the country, from the Ukrainian electricity network, at a time when Kiev and Moscow are exchanging accusations of bombing the site.

On Thursday, Guterres considered, during a visit to the city of Lviv in western Ukraine, where he met with Ukrainian President Volodymyr Zelensky and Turkish President Recep Tayyip Erdogan, that "any damage to the Zaporizhya station would be tantamount to suicide," calling once again to make the station, which is occupied by the Russian army, a "demilitarized" zone.

Zelinsky considered that "the full restoration of security" at this site "could begin after the mission begins its work."

In his daily message on Friday evening, Zelensky said that "this summer will go down in the history of many European countries as one of the most tragic ever."

Economically, the credit rating agency "Standard & Poor's" decided to raise Ukraine's credit rating on Friday, after creditors granted it a two-year exemption last week from paying off its foreign debts.

S&P Global (S&P) said in a statement that raising the external debt credit score to CCC+ reflects Ukraine's "strong international financial support commitment, coupled with dwindling foreign exchange reserves although still relatively high." ".

"As a result, the near-term risks to the government's liquidity position and, more broadly, its ability to meet its commercial debt, including in foreign currencies, appear manageable," she added.

But S&P said that the move complicates a similar decision taken by Fitch Agency, based on the assumption that the United States and the European Union will continue financing Kiev in the coming months.

A loan agreement with the International Monetary Fund could ease pressure on Ukraine.

S&P expects the country's economy to contract by 40 percent this year.