Washington (AP): Artificial intelligence researchers have said they deleted more than 2,000 web links to suspected child sexual abuse imagery from a dataset used to train popular AI image-generator tools.

The LAION research dataset is a huge index of online images and captions that's been a source for leading AI image-makers such as Stable Diffusion and Midjourney.

But a report last year by the Stanford Internet Observatory found it contained links to sexually explicit images of children, contributing to the ease with which some AI tools have been able to produce photorealistic deepfakes that depict children.

That December report led LAION, which stands for the nonprofit Large-scale Artificial Intelligence Open Network, to immediately remove its dataset. Eight months later, LAION said in a blog post on Friday that it worked with the Stanford University watchdog group and anti-abuse organisations in Canada and the United Kingdom to fix the problem and release a cleaned-up dataset for future AI research.

Stanford researcher David Thiel, author of the December report, commended LAION for significant improvements but said the next step is to withdraw from distribution the “tainted models” that are still able to produce child abuse imagery.

One of the LAION-based tools that Stanford identified as the “most popular model for generating explicit imagery” - an older and lightly filtered version of Stable Diffusion - remained easily accessible until Thursday, when the New York-based company Runway ML removed it from the AI model repository Hugging Face. Runway said in a statement Friday it was a “planned deprecation of research models and code that have not been actively maintained”.

The cleaned-up version of the LAION dataset comes as governments around the world are taking a closer look at how some tech tools are being used to make or distribute illegal images of children.

San Francisco's city attorney earlier this month filed a lawsuit seeking to shut down a group of websites that enable the creation of AI-generated nudes of women and girls. The alleged distribution of child sexual abuse images on the messaging app Telegram is part of what led French authorities to bring charges on Wednesday against the platform's founder and CEO, Pavel Durov.

Durov's arrest “signals a really big change in the whole tech industry that the founders of these platforms can be held personally responsible,” said David Evan Harris, a researcher at the University of California, Berkeley who recently reached out to Runway asking about why the problematic AI image-generator was still publicly accessible. It was taken down days later.

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Hyderabad (PTI): The South Central Railway on Saturday announced that it would run four special trains to manage the surge in passengers resulting from the large-scale cancellation of IndiGo flights here.

The move comes as flyers face significant disruption and long queues at the airport due to the cancellation.

A press release from the SCR said it is running the special trains to clear the extra rush of passengers to Chennai, Mumbai and Shalimar (Kolkata) from Hyderabad today.

Meanwhile, as many as 43 outbound Indigo flights were cancelled from here on Saturday, Rajiv Gandhi International Airport sources said.

ALSO READ: IndiGo cancels over 200 flights from Delhi, Mumbai on Saturday

Similarly, 26 incoming flights are also likely to be cancelled during the day, they said.

The flight cancellations drew ire from passengers, who thronged the IndiGo counters at the airport demanding to know the exact situation.

“This is utter nonsense! Digiyatra done, message received that departure has been rescheduled ahead of the scheduled departure and now upon arriving at Hyderabad airport coming to know at the security checkpoint that Indigo flight is cancelled,” Tarun Singha, former Ministry of Defence spokesperson said in a post on X.

“But the thing is if you don’t shout they do nothing. Example at Hyderabad Airport, there was no staff no flight information for an hour. Then a fellow passenger started shouting on mic and an Indigo staff appeared finally,” a netizen said in a post.

On Friday, when IndiGo cancelled over 1,000 flights from across airports, its CEO Pieter Elbers apologised in a video message for the major inconvenience caused to passengers due to the disruptions.

In the one-way video communication, Elbers also said that the airline was expecting fewer than 1,000 flights on Saturday.