India's S-400 deal with Russia may trigger US sanctions: Congressional report

India's multi-billion dollar deal to purchase the Russian-made S-400 air defence system may trigger US sanctions on New Delhi, a US Congressional report has warned. ​​The Congressional Research Service (CRS) - an independent and bipartisan research wing of US Congress - in its latest report to Congress, said India is "eager for more technology-sharing and co-production initiatives.