Japan says it has 'legal right' to destroy any foreign balloon in its airspace

• Japan's defence minister says it would have the legal right to destroy any balloon that enters its domestic airspace.
• Tokyo is investigating if balloons like the Chinese one shot down over the US have been used to probe Japan's defences.

Japan is investigating reported sightings of balloons over its territory in recent years, due to growing concerns that China is deploying the relatively unsophisticated technology to obtain intelligence about Japan's defences.