The German military's Patriot anti-aircraft missile system deployed to protect the NATO summit in the Lithuanian capital Vilnius are ready four days before the start of the meeting.
Three German combat squadrons reported full operational readiness to NATO at 9:10 am (0710 GMT) on Friday, dpa has learnt.
With the weapon systems and about 250 soldiers, the German Air Force is taking over protection against ballistic missiles, but also against aircraft and cruise missiles.
The alliance is thus taking account of the heightened security situation, without there being any concrete indications of an attack.
The Patriots are stationed at Vilnius airport, which is about 160 kilometres from the Russian exclave of Kaliningrad and 30 kilometres from Belarus.
The two-day NATO summit begins on Tuesday.
