KYIV, Ukraine (AP) — American-made Patriot missiles have arrived in Ukraine, the country’s defence minister said Wednesday, providing Kyiv with a long-sought new shield against the Russian airstrikes that have devastated cities and civilian infrastructure.

The US agreed in October to send the surface-to-air systems, which can target aircraft, cruise missiles and shorter-range ballistic missiles such as those that Russia has used to bombard residential areas and the Ukrainian power grid.

“Today, our beautiful Ukrainian sky becomes more secure,” Defence Minister Oleksii Reznikov said in a tweet.

The missiles are the latest contribution from Western allies, who have also pledged tanks, artillery and some types of fighter jets as Ukraine gears up for an expected counteroffensive.

Reznikov thanked the United States, Germany and the Netherlands, without saying how many missile systems had been delivered or when they arrived.

Ukrainian air force spokesman Yurii Ihnat said late Tuesday that delivery of the systems would be a landmark event, allowing Ukrainians to knock out Russian targets at a greater distance.

Germany’s federal government website on Tuesday listed a Patriot system as among the military items delivered within the past week to Ukraine. German Foreign Minister Annalena Baerbock confirmed that to lawmakers Wednesday in Berlin.

Germany has also delivered the second of four medium-range IRIS-T air defence systems that it pledged last year, Baerbock said.

Reznikov said he first asked for Patriot systems when visiting the US in August 2021, five months before Russia’s full-scale invasion and seven years after Russia illegally annexed Ukraine’s Crimea peninsula. He described possessing the system as “a dream” but said he was told in the US at the time that it was “impossible.”

Ukrainian personnel have been trained on the Patriot battery, which requires up to 90 troops to operate and maintain it.

“Our air defenders have mastered (the Patriot systems) as far as they could. And our partners have kept their word,” Reznikov wrote.

Experts have cautioned that the system’s effectiveness is limited and that it may not significantly change the shape of the war, even though it will add to Ukraine’s arsenal against its bigger enemy.

The Patriot was first deployed by the US in the 1980s. The system costs approximately $4 million per missile, and the launchers cost about $10 million each, analysts say. At such a cost, it’s not advantageous to use the Patriot to shoot down the smaller, cheaper Iranian drones that Russia has been buying and using in Ukraine.

In other developments Wednesday, China denied recent reports that Chinese drones have been found on Ukraine battlefields. China has insisted that it will not help arm Russia, one of its key allies.