Hindu Rao, one of the largest hospitals in the Indian capital New Delhi, has been closed for a deep clean, after a nurse there tested positive for coronavirus.

“Since she has been on duty in various locations within the campus over the last two weeks, we are closing down the hospital till we fully sanitize and complete contact tracing,” said Varsha Joshi, commissioner for the North Delhi Municipal Corporation. He added that a thorough inquiry will be conducted.

The hospital will only be functional again after the sanitization work finishes, per Health Ministry guidelines, she added.

Delhi has reported 3,424 positive coronavirus cases, including 53 deaths.