“To protect Ukraine from Russian missiles and drones, it urgently needs greater air defense,” he said at the start of his seventh visit to Ukraine since the all-out war broke out in February 2022.

His visit was not announced due to security reasons.

Baerbock said Kiev's allies must "unite" for the sake of Ukraine and to prevent Russian President Vladimir Putin from sending troops to "our borders."

He said a German-led initiative aimed at building Ukraine's AI security has raised about $1 billion. “And we are working hard to ensure that this happens even more,” the minister said.,

"We are turning over every stone multiple times and have also moved in with an additional Patriot unit."

Ukraine has been on the backfoot for months due to shortages of equipment, ammunition and troops in the third year of the war.

Kharkiv, a large city in the north-east of the country, not far from the Russian border, is being bombed daily. Russian ground forces are also advancing in the wider Kharkiv area.

The Russian attacks forced Baerbock to cancel a planned visit to Kharkiv on Tuesday.He visited the city in January 2023, which was heavily attacked by Russian forces at the beginning of the war.

Shortly before Baerbock's visit, Ukrainian President Volodymyr Zelensky once again stressed the urgency of acquiring air defense systems and Western fighter jets in his country.

"Unfortunately, there is a lack of momentum on these two issues in the free world," he said Monday evening.

Zelensky has repeatedly requested the delivery of two more Patriot air defense systems to protect Kharkiv.

Ukraine reportedly has three of the most powerful US-made air defense systems, with the German government providing two of them and recently promising a third unit.The other Patriot unit currently operating in Ukraine comes from the US. Washington is considering delivery of another system.

German efforts to obtain patriots from partner countries in Europe or abroad have not yet succeeded.sd/svn