Territorial disputes of China

More than 50 US and Japanese warplanes flew over waters off Japan this week amid rising tensions with China and Russia

Japan lodged a protest with China on Monday over a Chinese naval vessel sailing near disputed islands, a Japanese official said, as reports emerged of Russia also sending its own navy ship to the area.

The islets in the East China Sea, known as the Senkaku by Tokyo and the Diaoyu by Beijing, are at the centre of a long-running dispute between Japan and China.

China has made the second largest incursion into Taiwan's air defence zone this year with Taipei reporting 30 jets entering the area, including more than 20 fighters.

Taiwan's defence ministry said late Monday it had scrambled its own aircraft and deployed air defence missile systems to monitor the latest Chinese activity.

These measures were taken to "warn the United States", according to a statement from the Combat Command of the Eastern Zone of the People's Liberation Army of China.

India has received a new batch of S-400 anti-aircraft missile systems from Russia, India Today reported, citing high-ranking sources.

"According to sources, the batch of S-400 missile systems was delivered by ship and is already in service. Parts of the missile system arrived by air and sea and were quickly deployed to their designated places," the newspaper said.

The US have stepped up exercises in the region as China presses its territorial claims over the South China Sea with Beijing also ramping up pressure on Taiwan

Taiwan accused Beijing of bullying and damaging regional peace on Oct. 2 after Chinese fighter jets and bombers made their largest ever incursion into the island's air defence zone.

Beijing marked its National Day on Friday with its biggest aerial show of force against Taiwan to date, buzzing the self-ruled democratic island with 38 warplanes, including nuclear-capable H-6 bombers.

Twenty Indian soldiers were killed during "hand-to-hand' fighting with Chinese troops in a disputed Himalayan region, India's military said, the first deadly clash between the nuclear powers in decades.

Both sides blamed the other for June 15's violence, which followed weeks of rising tensions over their competing territorial claims, with thousands of extra troops deployed.

China's defense ministry warned on July 24 that it was ready for war if there was a move toward Taiwan's independence, accusing the United States of undermining global stability and denouncing its arms sales to the self-ruled island.

The United States said it's concerned by reports of China's interference with oil and gas activities in the disputed waters of the South China Sea, where Vietnam accuses Beijing of violating its sovereignty.