Passengers on the stopped trains were stranded on the rails since about 7:45 p.m., Metro-North said.
Trains were running on all lines -- New Haven (Conn.), Hudson and Harlem -- except on the Danbury (Conn.) branch, it said.
The trains were running on delays and with huge backups in the system.
All trains and services had been halted after the computer system that controls the trains went down at about 7:45 p.m.
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