The two low-intensity bombs that went off in S4 and S5 sleeper coaches of Bangalore-Guwahati Express about ten minutes after the train pulled into the platform in the morning, triggered chaotic scenes with panic stricken-passengers scurrying for safety.
The woman killed in the mishap has been identified as Swathi, employed with Tata Consultancy Services (TCS) in Bangalore, and was travelling to her home town Guntur in Andhra Pradesh along with a friend, police said.
Today's incident is among the rare terror attacks on trains in Tamil Nadu with explosions that had occured in three trains in 1993 to mark the observance of Babri masjid demolition day and a blast in RSS office here a few years later.
However, major terror attacks in Tamil Nadu were a bomb blast in Chennai airport in 1984 killing 33 people and the Coimbatore blast in 1998 in which 60 people were killed.
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However, Tamil Nadu government is not treating today's explosions as a terror attack as of now, according to sources in the Union Home Ministry.
The train continued its onward journey after railway authorities replaced three damaged coaches while other trains were being operated as scheduled after a brief disruption, railway officials said.