NEW DELHI — Arun Jaitley, the former Indian finance minister and one of Prime Minister Narendra Modi’s closest associates, died in hospital on Saturday, nearly two weeks after he was admitted following breathing difficulties, officials said.

Jaitley, 66, a senior leader of the Bharatiya Janata Party (BJP), stepped down as finance minister in January due to ill health, just months before elections that returned Modi’s Hindu nationalists to power.

“With the demise of Arun Jaitley Ji, I have lost a valued friend, whom I have had the honor of knowing for decades,” Modi said on Twitter. “His insight on issues and nuanced understanding of matters had very few parallels.”

Azhar Zai, a longtime friend of the deceased leader and a community leader in Jeddah, mourned Jaitley’s death. “I knew him for the last 47 years. I was his colleague in 1972 in Shri Ram College of Commerce in Delhi. He was a genius, a model of sincerity and deeds from his student life. A personality of a strenuous wonderful smooth flow of intelligentsia thoughts and induction,” he said. “Jaitley was loving, dependable and a friend in need, as per my own experience. He provided courteous advice to his countless advocate colleagues. His death is a great loss to the country,” Zai added.

Jaitley was admitted to All India Institute Medical Sciences in New Delhi on Aug. 9.

A diabetic, his health had worsened after he underwent a kidney transplant in May last year. He also had to skip the presentation of the interim budget in February when he was in hospital in the United States for cancer treatment.

The lawyer-turned-politician also had triple heart bypass surgery when he was 52.

Jaitley’s urbane and articulate manner helped him win friends across party lines and industry.

The BJP lost another veteran party leader and former minister of external affairs when Sushma Swaraj died after a cardiac arrest earlier this month.

During his tenure as finance minister, Jaitley led the enactment of a bankruptcy code and a national goods and services tax law that had languished for almost 20 years.

The implementation of the GST resulted in job losses for thousands of workers in small businesses, adding to his mixed record on economic management.

The Indian economy has been under a cloud for months, with latest government estimates showing it had slowed to a five-year low of 5.8 percent in January-March as a result of sluggish domestic and global demand and little growth in private investment. — Agencies