DETROIT -

Federal officials have indicted 18 people on drug charges as part of a crackdown on crime in the city.

U.S. Attorney Barbara McQuade also told reporters Thursday that her office will target gun cases in the east side zip code 48205 for 30 days. That ZIP code has been the city's deadliest this summer. Between June 21 and Aug. 21, Detroit police said there were 38 shootings and eight deaths have taken place within the 6.5-square-mile area.

Full Story:NE Side Of Detroit Has Violent, Deadly Summer

The effort is called "Project 48205." A federal agent is looking at gun-related crimes that could be prosecuted in federal courts.

McQuade said this summer that her office would go after weapons cases because federal sentences can be tougher than sentences for state charges.

Wednesday's indictments are part of an investigation into a decade-long cocaine and marijuana trafficking operation.

Detroit Mayor Dave says the efforts by McQuade's office send a message to criminals and that "it's just a matter of time before" they are caught.