Authorities in El Salvador have arrested a prominent attorney critical of President Nayib Bukele, in a move criticized by rights groups who say it reflects an increasing trend of “authoritarianism” in the country.

Ruth López was detained Sunday in what rights groups say represents a ‘dangerous escalation’ in President Nayib Bukele’s crackdown on dissent. The attorney general confirmed the arrest.

The corruption charges against Salvadoran rights activist Ruth López, a leading critic of President Nayib Bukele, are politically motivated, her advocates say.