WASHINGTON — The first Ebola hospital opened Monday in the District of Columbia as the Obama administration announced that it would begin accepting patients from Ebola-stricken West Africa in the United States.

The city of Dallas will soon be the first to receive a second facility to treat patients who are infected in the region, the White House said.

The announcement comes as the U.S. Department of Health and Human Services is seeking to determine whether to open an additional facility in the state of Texas for the treatment of more than 4,000 Ebola patients who have not yet been treated in the U:emergencies.

The U.N. says the number of people infected in West Africa has reached more than 1,600.

The federal government says the first patient was in critical condition at Washington-area hospital Marys Hopkins, where she was receiving treatment for a mild case of the virus.

The hospital has been receiving Ebola patients since November, and the U of M and Georgetown University are among other institutions that have taken them in.

The hospital was already home to several Ebola patients, including two Americans who were flown from Dallas to be treated there, and an American who had tested positive.

It was not immediately clear if that person was an Ebola patient or a U.C.-CIF patient.

The White House did not say how many people have been admitted to the hospital since the Dallas outbreak began, but officials said they were hopeful of getting a number of patients discharged within the next two weeks.