The Trump administration on Tuesday temporarily halted all funding for science research issued by the National Institutes of Health before releasing the funds later in the day, according to emails obtained by The Washington Post and more than a half-dozen federal officials familiar with the matter.

The halt stemmed from a footnote in an Office of Management and Budget document, according to an email sent to NIH staff Tuesday afternoon by the NIH’s associate director for budget, Neil Shapiro. The OMB gave the NIH its “full-year apportionment” of congressionally mandated funds, Shapiro wrote, but included a footnote limiting what the NIH could spend the money on.