Former Air Force chief BS Dhanoa on Saturday termed S-400 missile system as a `game-changer` and stressed the need to speed up the defence acquisition process. "I have always said that S-400 is a game-changer .

S-400 missile system game-changer, need to speed up defence acquisition: Former Air Chief

President Recep Tayyip Erdogan on Monday hailed the controversial delivery of a Russian missile defence system despite the threat of US sanctions, as Turkey marked the third anniversary of a bloody coup attempt.

Erdogan hails S-400 deal as Turkey marks 2016 coup bid anniversary

Turkey ignores US warnings as it continues to take delivery of Russia's S-400 Turkey ignored US warnings as it continued Saturday to take delivery of Russia's S-400 missile defence system near Ankara, news agency AFP reported quoting a defence minstry statement.

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Britain sends second warship to gulf amid escalating tensions with Iran: Report Amid growing tensions with Iran after British Royal Marines seized an Iranian tanker off the coast of Gibraltar last week, Britain is sending a second warship to the Gulf, Sky News report said.

India's decision to buy the long-range S-400 missile defence system from Russia will have serious implications on defence ties, the Trump administration has warned.

India's buying of S-400 from Russia will have serious implications on defence ties: US 

The US State Department has told WION that it urges all "allies and partners to forego transactions with Russia that would trigger sanctions". Prime Minister Narendra Modi had on Friday signed a deal with Russian President Vladimir Putin to buy the S-400 Triumf missile defence system from Russia.

US State Dept to WION: Urge allies to forego transactions with Russia that will trigger sanctions

Russian President Vladimir Putin will arrive in India Thursday evening. Prime Minister Narendra Modi and he will hold the 19th India-Russia annual bilateral summit on Friday, but all eyes will be on the S-400 Triumf defence system deal the two countries are expected to sign during Putin's visit.

Putin to arrive in India today, all eyes on S-400 missile defence system deal

The US on Wednesday urged its allies not to enter into transactions with Russia and warned that it would trigger American sanctions, a day after it was reported that India was planning to purchase multi-billion S-400 missile defense system from Moscow.

As Putin heads to India, US warns of sanctions

S-400 is known as Russia's most advanced long-range surface-to-air missile defence system

What is the S-400 missile defence system that India is eyeing to buy