USCIS had last indicated it would stay closed until May 4th, but today it said that at least another month would be needed for reopening. Here is the announcement:
On March 18, U.S. Citizenship and Immigration Services temporarily suspended in-person services at its field offices, asylum offices, and application support centers (ASCs) to help slow the spread of coronavirus (COVID-19). USCIS is readying offices to reopen on or after June 4. Employees in these offices are continuing to perform mission-essential services that do not require face-to-face contact with the public while the offices are closed.
While offices are temporarily closed, USCIS will continue to provide limited emergency in-person services. Please call the USCIS Contact Center for assistance with emergency services.
USCIS field offices will send notices to applicants and petitioners with scheduled appointments and naturalization ceremonies impacted by the extended temporary closure. USCIS asylum offices will send interview cancellation notices and automatically reschedule asylum interviews. When the interview is rescheduled, asylum applicants will receive a new interview notice with the new time, date and location of the interview. When USCIS again resumes operations for in-person services, USCIS will automatically reschedule ASC appointments due to the temporary office closure. Individuals will receive a new appointment letter in the mail. Those who had InfoPass or other appointments must reschedule through the USCIS Contact Center once field offices are open to the public again. Please check to see if the respective office has been reopened before calling the Contact Center.