Advanced air defence systems are designed to protect entire cities from air attacks.
Russian air raids on Monday killed 19 people in Ukraine, wounded more than 100 and knocked out power supplies across the country.
On Tuesday, Ukraine received the first of four IRIS-T SLM air defence systems Germany promised to supply, a German defence ministry source said.
Register now for FREE unlimited access to Reuters.com RegisterNATO Secretary-General Jens Stoltenberg, speaking ahead of a two-day meeting of the alliance's defence ministers on Oct 12-13 in Brussels, urged allies to provide additional air defence systems.
Discussions of the more than 50 countries will focus on providing additional air defence systems to Ukraine, said the U.S. ambassador to NATO, Julianne Smith.