Internet trolls from Russia and Iran sent more than 10 million tweets in a bid to spread disinformation and discord in the West, it emerged yesterday.

On the day of the Brexit vote, they tweeted posts with the hashtag ReasonsToLeaveEU more than 1,000 times.

Twitter yesterday released a huge cache of pictures, videos and tweets related to ‘potentially state-backed information operations’.

Internet trolls from Russia and Iran sent more than 10 million tweets in a bid to spread disinformation and discord in the West

It is one of the largest archives of political misinformation ever collated.

The data is linked to thousands of accounts thought to originate from a Russian ‘troll factory’ known as the Internet Research Agency and Iran.

From more than 4,500 suspect accounts, 3,841 came from Russia and 770 from Iran.

Twitter said it will ‘continue to proactively combat nefarious attempts’ to undermine the integrity of its network

The data included more than 10million tweets and two million pictures, videos or other media dating back to 2009.

Experts at the US-based Digital Forensic Research Lab said yesterday the tweets sent on the day of the UK referendum vote ‘should not be taken as a larger Russian attempt to interfere in Brexit’.

Twitter said it will ‘continue to proactively combat nefarious attempts’ to undermine the integrity of its network.