Google office in Pune was briefly put on alert.
The five-day event, on the theme 'The runway to a billion opportunities', will showcase India's growth in aerospace and defence capabilities.
The first day of Aero India 2023 featured aerobatics along with a large exhibition and trade fair.
Nearly 809 companies from 98 countries are taking part in Aero India 2023.
Inaugurating the event, PM Modi said that Aero India reflects India's new strength and aspirations. He added that the made-in-India Tejas aircraft and INS Vikrant as examples of India's potential.
"India's successes are giving proof of its possibilities and capability and added that Tejas aircraft roaring in the sky is the proof of the success of 'Make in India'. The new India of the 21st century will neither miss any opportunity nor leave any stone unturned in its hard work. We are gearing up," PM Modi said in his address.
The Prime Minister also underscored the importance of Aero India taking place in Karnataka which is the hub of India's technological advancement.
The government, under its "Make in India" policy, has been insisting that manufacturers such as Lockheed Martin Corp, Boeing, and Airbus share technology or make more than parts in the country.
United States Charge d'Affaires Ambassador to India Elizabeth Jones is leading the largest-ever US delegation to the biennial air show.
251 agreements with expected investments of Rs 75,000 crore are likely to be signed between various Indian and foreign defence companies.
Air India is expected to announce a potentially record deal to buy nearly 500 jets from Airbus SE and Boeing Co, worth more than $100 billion at list prices.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)