Donald Trump's administration has appeared to ban at least three Government agencies from speaking to journalists, providing documents to the public or even tweeting. Department of Agriculture, Department of Health and Human Services and Environmental Protection Agency staff are all reportedly subject to gagging orders. As well as the prohibition of social media posts ... the EPA has been ordered to freeze all grants, contracts and other agreements until further notice. A memo sent to EPA staff said there should be no press releases sent to "external audiences" and that "no social media will be going out". The letter ... also says that a digital strategist will be drafted in to oversee the agency's social media and that "existing, individually controlled social-media accounts may become more centrally controlled". Department of Health and Human Services (HHS) ... employees were told not to publish any new documents or correspondence in any public forum, including the Federal Register, and not to discuss any documents or rules with public officials until it is reviewed by the administration. Staff at the USDA's Agricultural Research Service received a memo on Monday telling them not to provide any documents to the public including press releases and social media. The email told employees, including about 2,000 staff scientists, that "starting immediately and until further notice", they could not release any documents or post on social media.