New Delhi: Russia is committed to delivering the remaining units of S-400 air defence system to India by 2025-2026, said Russian deputy chief of mission Roman Babushkin Monday while highlighting that the system performed “very efficiently” during recent India-Pakistan tensions.Babushkin also said Russian foreign minister Sergey Lavrov is likely to visit India soon. The visit will help prepare the ground for India-Russia summit that will see President Vladimir Putin travelling to India later this year.Babushkin confirmed that the contract for the remaining two S-400 units is on track, with deliveries expected to be completed by 2025-26, in line with publicly announced timelines. India had signed a $5.43 billion deal with Russia in 2018 for five squadrons of S-400 Triumf missile system, a state-ofthe-art air defence platform capable of engaging multiple aerial threats at long ranges. Three squadrons have already been delivered.