A federal judge has hit pause on efforts to open the nation’s first so-called safe injection site, where heroin users would be able to inject the drug under medical supervision, citing Philadelphia’s “frayed” nerves in the midst of a global pandemic and mounting protests for social justice reform.

U.S. District Judge Gerald McHugh of the Eastern District of Pennsylvania on Tuesday granted the government’s request to temporarily block the site from opening until the U.S. Court of Appeals for the Third Circuit can review the issue.