WASHINGTON (AP) — The Pentagon says it's made no decisions yet about calling up reservists following President Donald Trump's order authorizing the call-up of an unspecified number to help with the coronavirus response.

The Pentagon's chief spokesman says the Defense Department anticipates tapping people mainly for administrative duties and "high-demand medical capabilities whose call-up would not adversely affect their civilian communities.”

Spokesman Jonathan Hoffman says before calling up any members of the National Guard, the department would consult with state officials. Hoffman says its “a dynamic situation” and the Pentagon currently doesn’t have “a projected number of expected activations.”

Trump said in a letter to Congress on Friday that he had authorized Defense Secretary Mark Esper to order units and individual members of the Selected Reserve, as well as certain Individual Ready Reserve members, to active duty.

The reserve call-up likely will assist the military as it deploys field hospitals to cities hard hit by COVID-19 and provide medical support to state and local authorities.