The United States' top general told the military there had been no change yet to Pentagon policy on transgender personnel, after President Donald Trump's announcement of his plans to ban them appeared to catch senior officers by surprise.
Marine General Joseph Dunford, chairman of the military's Joint Chiefs of Staff, began his note to service chiefs, commanders and senior enlisted leaders by acknowledging the uncertainty that followed Mr Trump's announcement.
"I know there are questions about yesterday's announcement on the transgender policy by the President," Mr Dunford wrote.
"There will be no modifications to the current policy until the President's direction has been received by the Secretary of Defense and the Secretary has issued implementation guidance," Gen Dunford said in the message.
Gen Dunford then made the assurance that the US military would "treat all of our personnel with respect."
Mr Trump issued his surprise announcement yesterday morning in a series of Twitter postings, saying he would ban transgender people from the US military, a move appealing to some in his conservative political base but creating vast uncertainty for active-duty and reserve transgender service members, who say they number in the thousands.
The action came on the same day that the Trump administration told a US appeals court in New York that federal law does not ban discrimination against gay employees, a sharp reversal of the position Democratic former President Barack Obama took.
As a presidential candidate, Mr Trump last year vowed to fight for lesbians, gays, bisexuals and transgender people.
His decision drew condemnation from rights groups and some senators in both parties as politically motivated discrimination.
But it was also praised by conservative activists and some of his fellow Republicans.
The White House said Mr Trump had "extensive discussions with his national security team," and that Defense Secretary Jim Mattis was informed after the president made the decision on Tuesday to go ahead.
However the chief of staff of the US Army, General Mark Milley, said he had no advance knowledge of Mr Trump's decision before his announcement via Twitter yesterday. He added that was not unusual.
"I personally did not, but nor would I have expected to," Gen Milley said while speaking at the National Press Club.
Mr Trump cited "tremendous medical costs and disruption" as a justification for the ban, a point disputed by experts and advocates for allowing military service to be determined by an individual's capabilities, not gender identity or sexual preference.
Mr Trump's tweets caused alarm among some senior military officers and Pentagon civilians, who were caught off guard by it, three general officers in two services said.
"I hope our commander in chief understands that we don't transmit orders via Twitter, and that he can't, either," one said by telephone, speaking on the condition of anonymity.
"Even if this were an order, implementing it legally would take considerable time, if it's even possible."
Mr Trump's threat to ban transgender service members unleashed a storm of legal threats from advocates who say they are seeking plaintiffs who want to sue.
His surprise tweets did not make clear when a ban reversing Mr Obama's policy to allow transgender people to openly serve would go into effect, nor whether it applies to serving members of the military or those wishing to join.
But if the Defense Department actively roots out transgender people and discharges them from the military, the Pentagon is likely to face an especially contentious fight, legal experts say.
"There's no valid justification for excluding transgender people from the military," said Jon Davidson, legal director for LGBT rights group Lambda Legal.
It was also unclear whether it might go beyond active-duty forces and apply to members of the reserve.
