Pope Francis has recognised a second miracle attributed to the late Mother Teresa, clearing the path for the beloved nun to be elevated to sainthood next year, the archbishop of Kolkata said Friday.

Mother Teresa, celebrated for her work with the poor in the Indian city, is expected to be canonised on September 4 as part of the pope's Jubilee year of mercy, according to the Catholic newspaper Avvenire in Rome.

Archbishop of Kolkata Thomas D'Souza said the Vatican has recognised that Mother Teresa cured a Brazilian man suffering from multiple brain tumours in 2008.

"I was informed by Rome that Pope Francis has recognised a second miracle to Mother Teresa," D'Souza told AFP in Kolkata.

A panel of experts, convened three days ago by the Congregation for the Causes of the Saints, attributed the miraculous healing to Mother Teresa, Avvenire's Vatican expert Stefania Falasca reported on Thursday.

Teresa, who was born to Albanian parents in what is now Skopje in Macedonia, was known across the world for her charity work. She died in 1997 at the age of 87.

Nicknamed the "Saint of the Gutters", she dedicated her life to the poor, the sick and the dying in the slums of Kolkata, one of India's biggest cities, founding the Missionaries of Charity order of nuns there. She won a Nobel Peace Prize in 1979.
She was beatified by then pope John Paul II in a fast-tracked process in 2003, in a ceremony attended by some 300,000 pilgrims. Beatification is a first step towards sainthood.

Her missionary order in Kolkata - formerly known as Calcutta - said it was "thrilled" and grateful to the pope.

Sunita Kumar, a missionary spokeswoman who worked closely with Mother Teresa, said the late nun was an extraordinary woman who believed hard work was the best way to serve God.

"She of course read the Bible but her main understanding was to serve the poor," Kumar told the NDTV network. "Look at the work she did, not a day's holiday, not a day's rest."

"I am absolutely delighted that it happens in my lifetime," she also told AFP.

- Not without critics -
Her canonisation in Rome is expected to again draw large crowds for what will likely be one of the highlights of the special Jubilee year.

In 2002, the Vatican officially recognised a miracle she was said to have carried out after her death, namely the 1998 healing of a Bengali tribal woman, Monika Besra, who was suffering from an abdominal tumour.

The commission found Besra, diagnosed with tuberculosis and a cancerous tumour, got well after prayers by the Missionaries of Charity.

The traditional canonisation procedure requires at least two miracles.

For all the reverence with which her name and memory are treated, Mother Teresa was not without her critics.

She has been accused of trying to foist Catholicism on the vulnerable, with Australian feminist and academic Germaine Greer calling her a "religious imperialist".

One her most vocal detractors was the British-born author Christopher Hitchens.

In a 1994 documentary called "Hell's Angel," he accused her of being a political opportunist who failed those in her care and contributed to the misery of the poor with her strident opposition to contraception and abortion.

Questions have also been raised over the Missionaries of Charity's finances, as well as conditions in the order's hospices where there has been resistance to introducing modern hygiene methods.

A series of her letters published in 2007 also caused some consternation among admirers as it became clear that she had suffered crises of faith for most of her life.

She was granted Indian citizenship in 1951 and received a state funeral after her death.

Her grave in the order's headquarters has since become a pilgrimage site.