Italy train crash probe focuses on antiquated alert system

Investigators are trying to determine the cause of a head-on train crash in southern Italy in which 23 people were killed.

They are focusing in particular on the antiquated telephone alert system used to advise station masters of trains running on the single track.

Recovery operations using a giant crane and rescue dogs continued to remove the mangled debris after the two commuter trains slammed into one another in the Puglia region just before noon on Tuesday.