"The 2+2 dialogue with the US is to take place in the first week of September. The focus of the talks will be to strengthen defence and security cooperation," Sitharaman told reporters.
Mattis had visited India last September during which he held wide-ranging talks with Sitharaman.
"We will also follow up on what was agreed during my meeting with Secretary Mattis here last year," Sitharaman said.
"We are yet to arrive at a final position," she said.
The COMCASA will facilitate India to obtain critical defence technologies from the US.
"There is no financial crunch. We are not underplaying its (Mountain Strike Corp) importance. It was for Army to raise it," she said.
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