At least 4 killed as California trains derail

Two commuter trains have derailed in a L.A. Suburb at least 4 people have been killed.

GLENDALE, Calif. - Two Metrolink commuter trains derailed in the Los Angeles suburb of Glendale early Wednesday, killing at least four people and injuring dozens of others, authorities said.

www.msnbc.msn.com...

No word yet on what caused the crash, I hope there is no terrorism involved. and that it turns out to be a accident.

I've submitted this as ATSNN news...

from all the reports I've read, it does appear as an accident. They seemed to have "sideswiped" eachother... now what caused that ?

Here´s the link to the ATSNN-story :
9 Dead In California Train Derailment