CHICAGO (CBS) — Shots were fired on a CTA Green Line train early Sunday during an attempted robbery in the South Loop.

Nobody was hurt when the shots were fired on the train at 5:52 a.m. in the first block of East Cermak near the Cermak – McCormick Place stop, according to Chicago Police.

Two suspects tried to rob a passenger on the train and fired the shots before running away, police said.

Two people of interest were being questioned as officers continued to investigate.

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