An official of Rohini jail was tested positive for Covid-19 on Tuesday, four days after a staff member and 15 inmates were found infected with the virus.
A Tihar jail official confirmed that the person living next to the infected person in staff quarters would be asked to self-quarantine at home for 14 days.
This is the third instance in a week coming from this jail.
An inmate had tested positive on May 14 from the same jail when he visited a hospital for an intestine related issue.
As per the Union Health Ministry, Delhi has 10554 confirmed cases for Covid-19 and 168 deaths so far.
( With inputs from ANI )