"There's certain tension regarding NATO funding, and we partly support the American president's view that many NATO countries should invest more into their and also collective defense," the president said in an interview with the national radio LRT, aired on Wednesday.

"Starting with terrorism and finishing with North Korea and Russia's actions, we see that the number of challenges is not decreasing, therefore, those investments are necessary, and I think that all countries will gradually make necessary decisions," she said.

Trump has pledged to press allies during the NATO summit on Wednesday and Thursday to up their defense expenditure.

Lithuania significantly increased its defense spending after Russia annexed Crimea in 2014.