San Francisco, Nov 6 : Facebook said Monday it had blocked some 30 accounts on its platform and 85 accounts on photo-sharing social network Instagram over concerns they may be linked to foreign entities and aimed at interfering in US midterm elections.

The announcement came shortly after US law enforcement and intelligence agencies said they had no indication of efforts to disrupt election infrastructure but that Americans should be wary of Russian attempts to spread fake news.

A study published last week found that misinformation on social media was spreading at a greater rate than during the run-up to the 2016 presidential vote, which Russia is accused of manipulating through a vast propaganda campaign in favor of Donald Trump, the eventual winner.

"On Sunday evening, US law enforcement contacted us about online activity that they recently discovered and which they believe may be linked to foreign entities," Facebook said in a blog post.

"Our very early-stage investigation has so far identified around 30 Facebook accounts and 85 Instagram accounts that may be engaged in coordinated inauthentic behaviour.

"We immediately blocked these accounts and are now investigating them in more detail." It added all the Facebook pages associated with the accounts appeared to be in French or Russian languages.

The Instagram accounts were mostly in English, with some "focused on celebrities, others political debate." "Typically, we would be further along with our analysis before announcing anything publicly. But given that we are only one day away from important elections in the US, we wanted to let people know about the action we've taken and the facts as we know them today," Facebook added.

Despite an aggressive crackdown by social media firms, so-called "junk news" is spreading at a greater rate than in 2016 on social media ahead of the US midterm elections, Oxford Internet Institute researchers said in a study published Thursday.

Twitter said Saturday it deleted a "series of accounts" that attempted to share disinformation without giving a number.

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Balodabazar (Chhattisgarh), Jan 22 (PTI): At least 18 students of a government school were hospitalised on Wednesday after they complained of uneasiness in Chhattisgarh’s Balodabazar-Bhatapara district, with locals blaming nearby cement plants for causing pollution, officials said.

While officials said the exact reason behind the situation was yet to be ascertained, the authorities shut down the Alternate Fuel Resources (AFR) centre at one cement plant in the area over the alleged violation of green norms. The company said it has launched an internal probe.

At least 18 students of Government Higher Secondary Girls School at Khapradih village complained of uneasiness and drowsiness following which they were shifted to the Community Health Centre in nearby Suhela, Balodabazar-Bhatapara Collector Dipak Soni told PTI.

Later, six of them were referred to different facilities, including the district hospital, he said.

Their condition was reported to be stable, he said.

Complaints were received about pollution at AFR centre of Shree Cement plant located near the school following which an inspection was carried out on the factory premises, the official said.

Prima facie, violation of anti-pollution norms was found in its operation, which involved the use of chemicals for decomposition of materials for producing fuel, the official said.

A foul smell emanating from the AFR area might have caused uneasiness among students, he said.

Officials from the Chhattisgarh Environment Conservation Board and the Industrial Health and Safety and Labour Department have launched an investigation in the area to ascertain the exact cause behind the incident, he added.

Meanwhile, former chief minister Bhupesh Baghel claimed the students fell ill after gas leakage from two factories located near the school.

“Honourable Chief Minister ji! If you have woken up from slumber, take care of the fainting school children. Very frightening news is coming from Balodabazar. The scene is so horrifying that I cannot share it here, Baghel said in a post on X, tagging CM Vishnu Deo Sai and the CM's office.

“Due to gas leakage near Khapradih School in Suhela, the health of more than 40 children has suddenly deteriorated. Some children have fainted and some have been facing trouble in breathing. The condition of two children was critical. The rest of the children have been admitted to the hospital,” he claimed.

Students have been falling ill in the school for three consecutive days and the locals have repeatedly complained to the administration, which he said is “asleep”.

“The villagers say two big (cement) plants near the school are causing the pollution. Gas leakage is causing adverse effects on children. The smoke, chemicals and pollutants from the plants are polluting the air and affecting the children's health,” he alleged.

The management of Shree Cement said it has launched an internal probe into the matter and that it was committed to the health and well-being of nearby residents, workmen and their families.

“Shree Cement is deeply concerned about the health and well-being of the students who require medical attention and assures full support in providing necessary medical facilities. We are committed to the health and well-being of the community and take such matters with the utmost seriousness,” the plant management said in a statement.

The company strictly adheres to all statutory approvals and environmental norms, and as part of its sustainability efforts, it co-processes hazardous waste from nearby plants as an alternative fuel, “ensuring its safe disposal and preventing harm to the environment”, the statement said.

“We are also investigating this matter internally, and assure you that the health of the nearby residents, our workmen and their families remain our highest priority, and we are committed to taking all necessary actions to uphold this responsibility,” it added.