The National Park Service said on Saturday it regretted having retweeted two Twitter posts, including one comparing the size of crowds at President Trump’s inauguration on Friday with President Obama’s in 2009.

After retweeting the posts at issue, both of which originated from nongovernment accounts, the agency stopped its Twitter activity for several hours on Friday and Saturday.

“Out of an abundance of caution, while we investigated the situation involving these tweets, the Department of Interior’s communications team determined that it was important to stand down Twitter activity,” Tom Crosson, a National Park Service spokesman, said in a statement. The Park Service is part of the Interior Department.

According to CNN, the Interior Department circulated an email to employees on Friday saying that representatives of the Trump administration had ordered the shutdown.