Freight train derails in Cook County

POSEN, Ill. - A freight train derailed Thursday morning in south suburban Posen.

Freight train derails in Posen

What we know:

The derailment happened around 9 a.m. near 140 Street and Seeley Avenue, where at least a dozen railcars could be seen lying on the ground next to the tracks.

What we don't know:

There is no word on any injuries. It was not immediately clear what caused the derailment.

This story is developing. Check back for updates.