Lithuania summoned a Russian diplomat in protest after two Russian planes entered its airspace on Thursday, the Lithuanian foreign ministry said. A Sukhoi SU-30 fighter and an IL-78 tanker from the Russian exclave of Kaliningrad passed through Lithuanian airspace for 700 metres (2,300ft) before leaving it 18 seconds later, probably during aerial refuelling training, according to a short statement from the Nato member country’s military. Later on Thursday, the Lithuanian foreign ministry said it...