Moscow: Belarus said a Ukrainian missile fell on its territory on Thursday, raising fears of the conflict spilling over, with the Moscow ally sending investigators to establish the cause of the incident.

Belarusian President Alexander Lukashenko "was immediately informed", state news agency Belta reported. It said an S-300 missile from Ukrainian territory landed between 10 am and 11 am local time (0700 GMT and 0800 GMT), but gave no location.