Image copyright Getty Images Image caption Donald Trump Jr took control of the Trump Organisation empire before his father's presidential inauguration

Investors in a luxury property development in India are being offered the chance to have "conversation and dinner" with Donald Trump Jr.

The eldest son of the US president is visiting India this week and will promote the Trump Towers development near Delhi.

Critics say the Trump family is cashing in on the president's name.

But Mr Trump Jr has said he has been building relationships in India for years.

India importance

The full-page advertisement, which ran as the front cover of several Indian newspapers over the weekend, featured a picture of Mr Trump Jr together with text: "Trump is here. Are you invited?" and "Trump has arrived. Have you?"

Historian and biographer Patrick French was one of those criticising the advert:

Skip Twitter post by @PatrickFrench For the last however many days every newspaper in India has been wrapped in this abominable invitation to dinner with Trump Jr. pic.twitter.com/HXub9Hrpte — Patrick French (@PatrickFrench) February 18, 2018 Report

The 47-storey towers in Gurgaon, close to the Indian capital, are being developed by the Trump Organisation and local partners - with some apartments selling for more than $1m.

The Trump Organisation, formerly headed up by President Donald Trump, is an umbrella company for hundreds of investments in businesses including real estate. Donald Jr is now its executive director.

India is the group's biggest property market outside the US, and in 2016 the Trump family earned up to $3m (£2.14m) in royalties from ventures in India, according to a financial disclosure report.

Trump brand defies comatose property market - Analysis by Devina Gupta, BBC News, Delhi

Selling two towers with 254 ultra-luxury flats might seem like a tall order. But if the brand name was not enough, offering buyers a chance to meet the US president's son seems to be working.

The company claims to have already done $77m worth of deals, with an average selling price of about $1.1m. This makes it the fastest-selling project in a comatose Indian property market.

Changes in tax rules and attempts to clamp down on corruption cooled India's real estate industry.

But in the case of the Trump Towers and its Indian partners that's not been the case, as they use the Trump name to target wealthy Indians living both inside and outside the country.

'Bizarre'

Daniel S Markey, who worked on South Asia policy for the State Department during the George W Bush administration, said he was surprised by the involvement of Mr Trump Jr in an Indian business deal.

"The idea that the president's son would be going and shilling the president's brand at the same time Donald Trump is president and is managing strategic and foreign relations with India - that is just bizarre," he told the New York Times.

The Citizens for Responsibility and Ethics in Washington (Crew) - a watchdog group - added the Indian promotion to a list of instances it believes show the Trump name being used for commercial gain.

In an interview last week, cited by The Guardian, Donald Trump Jr said he had spent nearly a decade "cultivating relationships in India" and that the firm was "now seeing the response of that effort".

He said his itinerary was designed to steer clear of politics.

However, he is listed as a keynote speaker at a global business conference, which will be attended by Indian politicians, including Prime Minister Narendra Modi and some of India's business elite.

Media playback is unsupported on your device Media caption In 2014, Donald Trump told the BBC why he was so keen on investment in India as he launched a Trump Tower in Mumbai.

President Trump handed over control of his business empire to Donald Trump Junior and Eric Trump before his inauguration last year.

But the director of the US Office of Government Ethics said at the time that this did not go far enough to ensure there would be no conflict of interest between his politics and personal business.

Since taking office, critics have claimed the US president is continuing to profit from his family's business interests.

They have also accused the Trump family of playing up its connections with the White House in order to influence business deals.

In May last year, the company owned by the family of Jared Kushner, Donald Trump's son-in-law, pulled out of a real estate presentation in China.

Image copyright AFP Image caption President Trump and Indian Prime Minister Narendra Modi have forged a good relationship

Kushner Companies had been scheduled to pitch opportunities to real estate investors in China, but Mr Kushner's sister was widely criticised for using his name in a pitch.

And in November last year, President Trump's daughter, Ivanka, was criticised for speaking at a global entrepreneurs summit in Hyderabad, with some saying the summit had become more about Ms Trump and her namesake brand than the wider issue.