The Syrian government has ordered text messages containing politically sensitive words to be blocked. Sources familiar with the country’s filtering system say that Irish technology is being used to prevent the delivery of text messages including  words such as ” revolution” or “demonstration”. The country’s largest mobile phone company Syriatel Mobile Telecom SA have allegedly used blocking equipment from Cellusys Ltd, a privately-held company based in Dublin. Since public unrest in Syria erupted last year, text messages have been a crucial tool for protesters.