Nearly three dozen members of violent gangs based in the south Bronx face federal charges including racketeering, selling crack cocaine and marijuana and firearms offenses, according to court papers.

Court papers also describe two separate alleged attempts to murder rival gang members.

Federal agents and NYPD officers began rounding up the suspects early Wednesday. The raids and arrests were conducted by DEA and FBI agents, along with NYPD, and were centered in and around the Mill Brook Houses, a public housing project located in the Mott Haven section of the Bronx, officials said.

The suspects, members of gangs with names such as Millbrook Gangstas and Killbrook, are expected to appear in federal court in Manhattan later Wednesday.

Details of the investigation and charges are expected to be released by the U.S. attorney’s office in Manhattan later in the day as well.