German rescue crews using helicopters and boats on Tuesday pulled dozens of passengers from the wreckage of two German commuter trains that crashed head-on in rural southern Germany.
Authorities reported at least 10 fatalities and more than 80 others injured after the two trains - each traveling at about 100 kilometers an hour - collided early in the day on a remote section of track 60 kilometers southeast of Munich. The crash site, hemmed in by a river on one side and thick forest on the other, initially prevented emergency vehicles from reaching the site.
Police said later two black boxes had been recovered from the mangled wreckage near the spa town of Bad Aibling, and said they are being analyzed in hopes of learning how multiple safety measures failed.
Both trains were equipped with automatic braking devices to prevent such accidents, and authorities are trying to learn whether those systems were operational and how both trains ended up on the same track moving towards each other at the time of the crash.
Authorities called off their search Tuesday at nightfall and were set to resume their probe at daybreak Wednesday.
The locomotive engineers on both trains were reported among the dead.
WATCH: Related video of train collision in southern Germany