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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Mangaluru: In response to recent cross-border attacks by Pakistan and rising tensions along the international boundary, the Bureau of Civil Aviation Security has directed airports across India to enhance security protocols. As part of this nationwide alert, Mangaluru International Airport has intensified surveillance, and introduced secondary ladder point checks (LPSC).

Explaining about the new protocol, Jaideep Shenoy, Public Relations Officer at Mangaluru International Airport, said that the secondary ladder point security check involves a second round of frisking. Passengers will first undergo standard checks by the CISF at the security checkpoint. Before boarding the aircraft, either via a boarding bridge or a bus, they will be subjected to an additional frisking by airline staff at the gate. Shenoy emphasized that the LPSC is a standard security measure implemented at all airports.

He also urged travelers to stay updated by checking the airport’s official social media channels for accurate and timely information.

In light of circulating reports regarding restrictions on visitor entry, Shenoy clarified that the entry of visitors into the terminal has always been restricted. Visitors may accompany passengers up to the departure gates or receive them at the arrival gates, as per existing rules.

In an advisory issued on Friday, Mangaluru International Airport urged passengers to arrive well in advance of their scheduled departures to accommodate extended security checks, and to cooperate with airport and security personnel.

The airport authorities also urged people not to share any unverified information.

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