NEWARK, N.J. (AP) — Three men and three teenagers were indicted Monday on murder and other charges for the execution-style slayings that shocked New Jersey's largest city more than a year ago.

The grand jury charged all six suspects, who have reputed links to the MS-13 street gang, with murder, attempted murder, robbery and weapons offenses related to the Aug. 4, 2007 killings.

Essex County Prosecutor Paula Dow said the indictments took a year because charges against the three teens were upgraded from juvenile to adult court and because multiple agencies worked together to make sure the case was airtight.