Puerto Rico ? FBI agents on Thursday arrested eight police officers accused of planting drugs as fraudulent evidence against residents of housing projects in Puerto Rico.

A raid on the officers’ precinct in Mayaguez discovered a safe holding drugs that were kept in reserve to frame people, U.S. Attorney Rosa Emilia Rodriguez said at a news conference.

Agents have outstanding arrest warrants for two other officers, FBI spokesman Harry Rodriguez said.

The suspects allegedly used marijuana, cocaine and heroin to frame residents of low-income areas between 2004 and 2007.

If convicted, they face 10 years to life in prison, prosecutors said.