New Delhi, June 12 -- Ukrainian President Volodymyr Zelenskyy met with Nordic and Baltic leaders who were in Estonia for a regional summit Tuesday, a visit that comes amid friction over Ukrainian drones straying into the region in recent months.

The drones have crashed into the chimney of a power plant in Estonia, hit empty fuel tanks in Latvia and been shot down by Romanian fighter jets stationed in Lithuania. Ukrainian officials apologized, saying the drones had been aimed at military targets in Russia but were sent off course by Russian electronic interference.

Estonia hosted the summit in its capital of Tallinn amid Russia's 4-year-old, full-scale invasion of Ukraine. Estonia holds the rotating presidency of the NB8, a regional grou...