A missile has hit Bulgaria for the third time since the start of NATO's airstrikes against Yugoslavia four weeks ago.

A spokesman for the Bulgarian Interior Ministry said the incident occured Thursday night near a village Babitsa some thirty kilometres west of the capital Sofia and twenty kilometres from the Yugoslav border.

The spokesman said it was not clear whether the misslie was a NATO one or was fired by Yugoslav forces.

No one was injured, but correspondents say the incidents have added to anti-NATO sentiment in Bulgaria.