Despite pressure from the U.S. against proceeding with a purchase of Russian missile defense systems, India has already paid for 15% of the total cost, an Indian media report claimed on Friday. 

New Delhi paid $850 million to Moscow for S-400 batteries last September, the daily Hindustan Times reported, citing anonymous sources familiar with developments.

In October 2018, the two countries signed a deal for the sale of five sets of high-end air defense systems with a total cost of $5.4 billion.

Russia has said it would begin delivery by 2020, with plans for New Delhi to receive the final

Read more: India pays 15% of sum for Russian S400 missiles: report