"Our defence cooperation with India, as you know, is strong. It's a leading pillar of our broad relationship," State Department Deputy Spokesman Mark Toner told reporters.
"We support India's rise as a capable actor in the region, and part of that is deepening our defence cooperation," Toner said.
His comments came as its Defence Secretary Ashton Carter concluded his India visit.
In April, Defence Secretary returned to India for an
unprecedented third visit in less than a year.
"Never in our history we have supported an indigenous aircraft program in any other country," he said.
Lavoy said India US cooperation on counter terrorism has become a crucial pillar of a broader strategic partnership.
This is fitting as the US and India view acts of terrorism as threat to global peace and security but also to their common values of democracy, justice, the rule of law and the protection of every individual.
Lavoy said he would like the two countries to adopt more practical collaboration in all domain, in space, in the air, on the sea, under the sea, on land and on multilateral forums, in ways that respects India's sovereignty but also reflects their status as increasingly close partners who tackle problems side by side.
"It is the most dynamic relationship that we have today. Each of the things that we are doing enables us to take this to the next level and have to simultaneously work on expanding the partnership in new domain," Lavoy said in response to a question.
"This is a unique relationship worldwide where we can't choose between deepening and broadening. We have to do both simultaneously," he added.
