Condemning the incident, Jayalalithaa assured people that there was no need for panic as security measures have been tightened.
Tamil Nadu Chief Minister J Jayalalithaa ordered a CB-CID probe into the two bomb blasts on board the Bangalore-Guwahati train at the Central Railway Station here that left a woman passenger dead.
The injured have been identified as Murali (37), Krishnapant, Soren Pant, Santh, Bijan Kumar (24), Uma, Abdul Khan(24), Shihabul Haque (22), Vimal Kumar, Hari (21), Altaf Khan admitted to Government Hospital.
As a precautionary measure, police have stepped up security at the airport. Southern Railway has set up a helpline to provide information to the public.
Meanwhile, security at the railway station, where thousands of people arrive and depart daily, has been further stepped up and all inbound and out-bound trains were being subjected to extensive check.
A team of National Security Guard and explosive experts is likely to be sent to Chennai to join in the investigation into the blast. NIA team from Hyderabad is being rushed to the blast site, official sources said.
Chennai Central Railway Station where the twin bomb blasts took place on 1st May (Photo: DC)
Tamil Nadu DGP K Ramanujam said a special investigation team would investigate the blasts and added that Chennai was not the target.
The Bangalore-Guwahati Express left on its onward journey after railway authorities replaced three damaged coaches. The train departed at 12.15 pm after police who undertook extensive searches cleared it.
Police said a suspect has been detained in connection with the explosions and he was being questioned. However, initial investigations have suggested they were improvised explosive device (IED) blasts.
As panic-stricken passengers rushed out of the train in platform No 9 and also others in the neighbouring platform, police rushed to the spot and cordoned off the entire area.
The train arrived from Bangalore for a ten-minute halt at the Central Railway station, the major railway hub in this metropolis, at about 7.05 AM, and the explosions occurred in the coaches at about 7.15 AM.
Fourteen persons were also injured in the bomb blasts that occurred in quick succession in the S4 and S5 coaches of the train as it arrived at the Chennai central railway station.
Swati, an engineering graduate from a college in Hyderabad, had joined a leading software firm in Bangalore only four months ago and was returning home with a friend when the blasts claimed her.
He suffered extensive burns, traumatic brain injuries, respiratory failure, as well as kidney and liver damage: Doctor (Photo: Screen grab)
Police believe the IM was behind blasts at a campaign rally that Modi addressed in eastern India last October. The IM, which says it wants to establish a caliphate, poses the most serious threat so far from a home-grown group in Hindu-majority India.
Even before the explosions, security agencies had increased surveillance on suspected members of the Islamist Indian Mujahideen group, which has carried out a wave of low-level attacks in towns across India in recent years.
Mangled remains of a car which collided with another car, claiming three lives and causing injuries to 8 others near Vepanthattai on the Tiruchy-Chennai national highway, near Perambalur on Sunday. (Photo: DC)
Explosive devices concealed under seats went off in two coaches shortly after the train stopped at Chennai's central station at about 7 a.m.
Security is already tight in India as it nears the finish line of the world's biggest election that began early last month and is due to end later in May. Tens of thousands of police have been deployed for the vote.
No group has claimed responsibility for the rare attack in the city and police officials said they had no suspects for the moment.