A 19-year-old man from Miami has been sentenced to 56 years and four months in prison after pleading guilty to a string of robberies.

Lionell Sanders was sentenced Friday. He pleaded guilty on Dec. 9, 2013, to conspiracy to commit robbery affecting interstate commerce, and two counts each of robbery affecting interstate commerce and the possession of a firearm in furtherance of a crime of violence.

Prosecutors say Sanders and several other men targeted food delivery drivers and taxicab operators, beating them and robbing them of their personal items and items that were supposed to be delivered.