A celebrated Iranian-Canadian sculptor considered one of the Middle East's greatest living artists says he still doesn't know what prompted Iranian authorities to confiscate his passport and bar him from leaving Iran two weeks ago.

"They never told me, really," Parviz Tanavoli said minutes after emerging from the international arrivals section of the Vancouver airport on Monday afternoon.

"I've been doing this work for 50 years. I am not a political man. I just continue doing my artwork. And this artwork, it was never, ever before questioned."

Confiscated on arrival

Tanavoli said that on July 2, officials at Tehran's Imam Khomeini International Airport took his Iranian passport when he tried to board a flight for speaking engagements at the British Museum and Asia House in London.

He posted on Facebook that he tried unsuccessfully to resolve the issue at Iran's main passport office.

Tanavoli said last week that Iranian officials had received a complaint that his art work was "disturbing public opinion" and "spreading lies," which he dismissed as "baseless." But after returning to Canada he said he wasn't sure of the reason for his detention.

Tanavoli's son said Iranian officials returned his father's passport several days ago, which allowed him to fly to Canada.

After learning he would be detained in the country indefinitely, Tanavoli returned to his work preparing for an upcoming exhibition in Iran.

He explained that his artwork is what keeps him alive.

"The minute I found out I couldn't go ... I opened my studio," Tanavoli said. "I called my students, my helpers. We went back to the studio and began again."

He said he would return to Iran, despite his mysterious detention.

"I have to go back. I will go back," he said. "I have a studio house. I have a lot of my unfinished work."

Mideast Iran Artist

In this Feb. 9, 2015 file photo, Iranian artist Parviz Tanavoli stands near a detail of his sculpture "Poet Turning into Heech," at the Davis Museum on the campus of Wellesley College in Wellesley, Mass. Tanavoli was barred from leaving Iran while trying to travel to London. (Steven Senne/The Associated Press)

Return to Canada

Relieved friends and family carrying welcome balloons and flowers waved and laughed as a smiling Tanavoli wheeled his luggage cart into view at the Vancouver airport.

Bardia Tanavoli, one of Tanavoli's three children, said his father's arrival was especially auspicious because it was just four days short of the 1989 anniversary of the family's immigration to Canada.

"It's two celebrations this time," he said, smiling broadly.

All three of Tanavoli's adult children were at the airport on Monday to greet their father, as well as his wife, Manijeh Tanavoli.

Also on hand was Kambiz Sharif, a former student of Tanavoli's who studied under the famed artist in Iran and now has a sculpting studio in the Vancouver area.

Sharif described Tanavoli as his "sculptor-father."

Tanavoli's art has been displayed in major museums around the world, from New York's Metropolitan Museum to the Tate Modern in London. Some pieces have fetched huge sums at auction, such as a sculpture titled "The Wall (Oh, Persepolis)," which sold for $2.8 million in 2008.

Homa Hoodfar

Canadian-Iranian scholar Homa Hoodfar has been held incommunicado in Tehran's Evin prison since June 6. She is said to have been indicted by the Iranian authorities. (Canadian Press)

Another Canadian-Iranian dual citizen still detained in Iran is Montreal-based university professor Homa Hoodfar, who was indicted on unknown charges earlier this month.

The 65-year-old Concordia University professor was born in Iran but has been living in Quebec for 30 years. Her family said she travelled to Iran in February to see family and conduct academic research.

Several artists, poets, journalists and activists have been detained in Iran since President Hassan Rouhani's government reached a nuclear deal with world powers last year.

With files from The Associated Press