Sitharaman, who arrived here yesterday, attended the SCO defence ministers' meeting today.
Sitharaman is travelling to China from April 23 to 25 to attend a meeting of SCO defence ministers' meeting, they said.
Citing negotiations over aspects like cost, the defence minister said arriving at a decision on a deal is at times "frustrating," but the interest in the Indian missiles is "sustained."
Sitharaman, while speaking at a book release function here, said India is complying with nuclear non-proliferation regulations despite not being a signatory to the non-proliferation treaty (NPT).
Defence public sector undertakings and ordnance factories in the country have a lot of potential but they need to be revitalised and made more dynamic, Defence Minister Nirmala Sitharaman has said.
Rescue operations were being taken up by the fire and forest department officials with the Indian Airforce sending two helicopters on the directives of Defence Minister Nirmala Sitharaman after she was approached for help by Chief Minister K Palaniswami.
Officials said Sitharaman and Lorenzana deliberated on possible areas of defence cooperation and exchanged views on the security situation in the Indo-Pacific region.
"Post disengagement from the face-off in 2017, troops of both sides have redeployed themselves away from their respective positions at the face-off site. The strength of both sides have been reduced," she said replying to a question on the issue in Rajya Sabha.
Sitharaman also said the government was eagerly awaiting the "Mark II" version of the Tejas and that a number of countries have shown interest in the aircraft indigenously developed by HAL.
'The details of the defence corridor announced by the Prime Minister yesterday were worked out in 18 days time," Sitharaman said at the 'Defence and Aerospace Investment Opportunities in Uttar Pradesh', part of the ongoing 'Investors Summit-2018" here.
Defence Minister Sitharaman yesterday blamed Pakistan for the terror attack on the military camp and made it clear that Islamabad will pay the price for the "misadventure".
Nirmala Sitharaman has lashed out at Pakistan after the terror attack at the Sunjuwan camp.
Defence Minister Nirmala Sitharaman told reporters on Monday evening that the Indian army has ample evidence to prove that "the handlers of the terrorists were back in Pakistan."
"Civil constructions are taking place near the boundary walls (of Army camps across the country) and it is getting difficult to remove these constructions because these are taking place with permission," she told reporters yesterday.
The Defence Minister asserted that even though evidence of Pakistan's role may be shared, India still reserved the "right to respond adequately at the time our choosing".
While two families, who had to part way with large tracts of their lands received Rs 6.73 crore and Rs 2.45 crore respectively, the remaining 29 families got Rs 1.09 crore each
Replying to a question in the Lok Sabha, Defence Minister Nirmala Sitharaman said, "The license manufacturing/transfer of technology was not sought as it would not have been cost effective for a order of this size."
Meanwhile, the defence minister today approved financial assistance of Rs 14 crore to 10,207 families of ex-servicemen. from 'Raksha Mantri Ex-Servicemen Welfare Fund (RMEWF)', officials said.
The vacancies excluding personnel in dental and medical streams come to 59,622, Defense Minister Nirmala Sitharaman told the Lok Sabha.
Defence Minister Nirmala Sitharaman today slammed the previous UPA government for not taking a decision on the Rafale fighter jet deal for about 10 years and said she could not spell out in detail what happened due to the delay as it involved the nation's security.
"These allegations are shameful...The deal was finalised following a transparent procedure," Sitharaman told reporters.
Finance Minister Arun Jaitley, Defence Minister Nirmala Sitharman likely to accompany the Prime Minister to hard sell the India story at the WEF’s flagship annual event
Sitharaman yesterday visited forward army posts in remote Anjaw district of Arunachal Pradesh bordering China to take stock of the defence preparedness.
The minister, in her maiden visit to the state, was accompanied by General Officer Commanding-in-Chief of Eastern Command Lt Gen Abhay Krishna and other senior Army officers.
The defence minister conveyed to the top executives of the private defence industry that the government was "fully committed" to removing all the stumbling blocks.