Agartala, Oct 3 : The Tripura Police on Friday said that highly explosive devices and a mobile phone were used to trigger Wednesday''s low intensity bomb blasts in Agartala.

Deputy Inspector General (Police Control) Nepal Das said, “Samples collected from the blast sites by a team of the National Security Guard (NSG) from Delhi along with forensic experts from Kolkata have prima facie revealed that the explosives used were of most recent vintage.”

Das said the terrorists used a mobile phone as a timer device and batteries of nine volts, which enabled the serial blasts to take place within a short span of time.

The blasts had a lot of similarities with those, which took place in other parts of the country, Das said, adding, “The explosives also contained ammonium nitrate and fuel oil.”

At least two persons were killed and about 76 were injured when five bombs went off within 30 minutes in crowded market places and a bus stand.

The first blast went off at the Radhanagar Bus Stand around 7.30 p. m. Explosions also took place in Maharaja Ganju Bazar, Gobind Ballab Pant market, Bottala and the Agartala Motorstand.

Agartala Police arrested at least six persons in connection with the blasts on Thursday. (ANI)