Reports are claiming Twitter has blocked the Government from using its data for counter-terrorism surveillance.
The police, the Home Office, and intelligence services like MI5 have been cut off from some of the data contained on the social network, according to The Daily Telegraph.
The paper claims the Government used a third-party company to monitor Twitter activity and keep an eye out for anything related to terrorism, and the firm has now been blocked.
Twitter has always maintained the use of the site for surveillance purposes is "unacceptable and prohibited".
The debate over the usage of social media in terrorist events and the management of social media content has been heavily contested in the past.
There has been a greater focus on the subject after it emerged the Westminster attacker, Khalid Masood, had sent a Whatsapp message mere minutes before carrying out the assault.
Because of encyption, the Government has been unable to read it, and Home Secretary Amber Rudd has not ruled out legislating against companies like Twitter, Facebook, and Whatsapp to force them to turn over content related to terrorism.
The Home Office has not officially commented on the reports in relation to Twitter.