On Monday, Lithuanian and Latvian presidents, Dalia Grybauskaite and Raimonds Vejonis, met in Vilnius.
"We discussed issues related to strengthening military cooperation, including the joint acquisition of weaponry, especially air defense," Grybauskaite told at a joint press conference on Monday, quoted by the Baltic Times.
The Lithuanian president did not provide more details on the plans, but said that joint purchasing would be cheaper and more beneficial.
The Latvian leader added that the states were considering the purchase of medium-range air defense systems. Poland could also join the process, he suggested.
In May, the defense ministers for Estonia, Latvia, and Lithuania discussed plans to develop a joint air defense system.