Jailhouse slashings. Weapons and drug smuggling inside correctional facilities. Attempted murder. Social media-driven jewelry heists.

These were among the charges laid out Wednesday in indictments against 29 people suspected of being members or associates of the Mac Balla Bloods, one of the oldest and most influential street gangs in New York City that is particularly powerful within the city’s jail system.

The Mac Balla Bloods operated “an enterprise of violence emanating from Rikers Island,” the Bronx district attorney, Darcel Clark, said in announcing the charges.

Investigators described a smuggling operation that moved information and contraband among city jails and an upstate prison. The network shuttled scalpel blades into lockups and organized the sale of crack cocaine and suboxone strips, which are prescribed to treat opioid addiction but were sold for $100 each inside a maximum security prison in Pine City, N.Y., according to the indictments.