The first two carriages were successfully separated from the ill-fated train this morning at around 6:30 and 9:30, local authorities said, adding that they are working on lifting the third.
The last two carriages, which were heavily damaged inside the tunnel, will be pulled from the other end of the tunnel.
A section of the third carriage and the fourth to eighth carriages were inside the tunnel when the accident happened, according to site images.