UPDATED 03/02/12 12:25 p.m.

CHICAGO (CBS) –A dye pack exploded as a bank robber tried to make his getaway in the CTA Red Line subway Friday morning, prompting officials to reroute trains to the ‘L’ tracks.

A suspect was later apprehended.

WBBM Newsradio’s Brandis Friedman reports the FBI says a robber held up the North Community Bank at 800 N. State St., next to the portal to the Chicago Avenue Red Line subway stop.

LISTEN: WBBM Newsradio’s Brandis Friedman reports

Police responded to a holdup alarm at the bank around 11 a.m.

The robber apparently went down into the subway with his loot after fleeing the bank, but a security dye pack exploded, prompting the Fire Department to call a hazardous materials response, the FBI said.

Following the dye pack explosion, Red Line trains were rerouted to the Brown-Purple Line ‘L’ tracks between the Fullerton Avenue and Cermak-Chinatown stations.

The FBI had a suspect in custody as of 12:15 p.m.

WBBM Newsradio’s Bart Shore said trains were returning to the subway as of 11:49 a.m.

Police activity was also reported at the Chicago-Franklin CTA Brown Line stop. It was not clear if this was connected to the same incident.