Sri Lanka’s police said Sunday they will more than double the number of suspects arrested in an ongoing anti-narcotics crackdown condemned by the United Nations, with tens of thousands already detained.

At least 30,000 people have been arrested since the police operation — code-named “Yuktiya” or “Justice” — began in December, a crackdown denounced by rights activists.

Police on Sunday said they were launching a new phase to arrest a further 42,248 suspects.

“All police stations must work 24 hours a day for the next one month to arrest 42,248 suspects and bring them to justice,” the police said in a statement.

It came two days after the United Nations human rights agency criticized the police crackdown over allegations of unauthorized searches, arbitrary arrests and detention, ill-treatment, public strip searches and torture.

Volker Turk, the UN high commissioner for human rights, urged Sri Lanka’s government to review the operation and implement a rights-based approach to combating illicit drugs.

“Security forces have reportedly conducted raids without search warrants, detaining suspected drug sellers and users, with hundreds sent to military-run rehabilitation centers,” a spokesperson for Turk said Friday.