According to the USCIS:
As of March 18, U.S. Citizenship and Immigration Services has suspended routine in-person services until at least April 1 to help slow the spread of Coronavirus Disease 2019 (COVID-19). USCIS staff will continue to perform duties that do not involve contact with the public. However, USCIS will provide emergency services for limited situations. To schedule an emergency appointment contact the USCIS Contact Center.
USCIS domestic field offices will send notices to applicants and petitioners with scheduled appointments and naturalization ceremonies impacted by this 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 for the interview. When USCIS again resumes normal operations, USCIS will automatically reschedule Application Support Center appointments due to the office closure. You will receive a new appointment letter in the mail. Individuals who had InfoPass or other appointments at the field office must reschedule through the USCIS Contact Center, once field offices reopen to the public. Please check the USCIS Field Offices page to see if your field office has reopened before reaching out to the USCIS Contact Center.
USCIS will provide further updates as the situation develops.