Condoling the death of Britain's first woman prime minister Margaret Thatcher, Prime Minister Manmohan Singh said she was a "transformative figure" under whom Britain registered important progress on the national and international arena.
"I express my deepest sadness on the passing away of former British prime minister Baroness Margaret Thatcher," Manmohan Singh said in his message.
"She was a transformative figure under whom the United Kingdom registered important progress on the national and international arena," he said.
"People of India join me in sending our sincerest condolences to the Thatcher family, the government and people of the United Kingdom," he added.
Thatcher, who was admired as the "Iron Lady", died Monday after suffering a stroke. She was 87.
External affairs minister Salman Khurshid described Thatcher as a "remarkable, remarkable person, a great leader, powerful leader" and "she will be mourned."
"The knowledge she is no longer there is heart breaking and sad, and I would like to convey my condolence to her family and friends," he added.