Salvadoran investigative outlet El Faro has said two of its members’ assets, including a bank account and property, were frozen, in what it denounced as an escalation of political persecution for its work exposing corruption in the government of President Nayib Bukele.

“It’s another level of attack against us with a clear purpose,” El Faro Director Carlos Dada said in a news conference Thursday. “These are not fiscal measures. They are political measures trying to silence us.”

El Faro has publicly sparred with Bukele over its investigations into corruption during his administration, including revelations that his administration negotiated with gangs. The latest move comes shortly after the outlet released a documentary with PBS Frontline about the gang negotiations.