00:00At least 40 people are now confirmed dead as investigators close in on what caused the deadliest crash in the history of Spain's high-speed rail system.
00:12In an exclusive report, Reuters says investigators have found a broken joint in the tracks, a key failure point that may have triggered the disaster.
00:21According to a source briefed on the investigation, technicians examining the rails found long-standing wear in the joint between sections of the track, damage that had been there for some time.
00:33The report says the gap between those rail sections widened as trains continued to pass over it until the track finally failed.
00:41Investigators say three rear cars of one high-speed train carrying about 300 passengers jumped the track Sunday night and crossed into the opposite lane.
00:50They slammed head-on into an oncoming train carrying nearly 200 people. Both trains flipped.
00:57Search and rescue operations are still underway.
01:00Authorities have set up tents to collect DNA samples from families, working to identify victims and notify relatives.
01:07Spain's prime minister has ordered three days of national mourning beginning today.
