WASHINGTON ― The Environmental Protection Agency has frozen its grant programs, according to sources there.

EPA staff has been instructed to freeze all its grants ― an extensive program that includes funding for research, redevelopment of former industrial sites, air quality monitoring and education, among other things ― and told not to discuss this order with anyone outside the agency, according to a Hill source with knowledge of the situation.

An EPA staffer provided the information to the congressional office anonymously, fearing retaliation.

It’s unclear whether the freeze is indefinite or temporary as the agency transitions fully to the Trump administration; the Senate has not yet confirmed Trump’s pick for EPA administrator, Scott Pruitt. It’s also not clear the immediate impact the grant freeze would have on programs across the country, since EPA grants are distributed at varying intervals and frequency.

“I will say it’s pretty unusual for us to get these kinds of anonymous contacts from people at the agency, which makes me think it’s unusual,” said the Hill source.

A source who works closely with states and territories on EPA grants said they heard from the agency on Tuesday evening that a review of grants would be done by Friday.

Neither the Trump transition office nor the central press office at the EPA responded to a request for comment Monday.

The Huffington Post received a message that was reportedly sent to staff Monday that seems to cover the current agency guidance on talking to the press in general, not just about the directive on grants. The memo states that the agency is imposing tight controls on external communication, including press releases, blog posts, social media and content on the agency website.

I just returned from a briefing for Communication Directors where the following information was provided. These restrictions are effective immediately and will remain in place until further direction is received from the new Administration’s Beach Team. Please review this material and share with all appropriate individuals in your organization. If anyone on your staff receives a press inquiry of any kind, it must be referred to me so I can coordinate with the appropriate individuals in OPA. No press releases will be going out to external audiences.

No social media will be going out. A Digital Strategist will be coming on board to oversee social media. Existing, individually controlled, social media accounts may become more centrally controlled.

No blog messages.

The Beach Team will review the list of upcoming webinars and decide which ones will go forward.

Please send me a list of any external speaking engagements that are currently scheduled among any of your staff from today through February.

Incoming media requests will be carefully screened.

No new content can be placed on any website. Only do clean up where essential.

List servers will be reviewed. Only send out critical messages, as messages can be shared broadly and end up in the press. I will provide updates to this information as soon as I receive it.

(”Beach team” refers to staffers for the new administration working at the various agencies while new leadership is put in place; “OPA” most likely refers to the “Office of Public Affairs.”)

There are clearly major changes underway at the EPA as the Trump team takes the helm. Trump appointed Myron Ebell, the director of the Center for Energy and Environment at the libertarian think tank Competitive Enterprise Institute and a fierce EPA critic, to oversee the transition work at the agency. Axios reported Monday that the Trump team plans to cut $815 million from the agency’s budget, for programs like states and tribal assistance grants, climate programs and other “environment programs and management.”

Pruitt has a long history of battling the agency over environmental regulations as the attorney general of Oklahoma, describing himself as “a leading advocate against the EPA’s activist agenda.”

In a report later Monday night, ProPublica confirmed the freeze in an interview and reported it also includes EPA contracts. Ebell told ProPublica the freeze is to “make sure nothing happens they don’t want to have happen.”

“This may be a little wider than some previous administrations, but it’s very similar to what others have done,” he said.

But a former Obama administration EPA official tells HuffPost that while “it is completely normal for incoming administrations to come in and take stock of what’s happening across an agency,” the Trump administration’s moves so far are “extreme, and very troubling, especially when it comes to both the grant freeze and the public communications.”

“When it comes to the grants freeze, this could be especially problematic at the state level. EPA sends a huge amount of its budget to the states, where it is ultimately spent,” said the official. “That’s where you could ultimately see the most negative impacts, especially at times when states are already suffering budget challenges. Time will tell, but this is not a great start when it comes to supporting states or transparency and a commitment to sharing important information with the public.”

HuffPost also reported Tuesday that staffers at several other federal agencies, including the Department of Agriculture and Health and Human Services, have also been told to shut down external communication for the time being.

Do you work in a federal agency? Email us at scoops@huffingtonpost.com and let us know what you’re seeing and hearing.

This story has been updated with news of the ProPublica report and with a quote from an EPA official. It has also been updated with a response that grant reviews would be done by Friday.