An Indian court has acquitted four Hindus charged with triggering explosions on a train heading to India's border with Pakistan 12 years ago, killing 68 people, mostly Pakistani citizens.

Defense attorney Mukesh Garg says the court ruled Wednesday that investigators failed to conclusively prove that the accused were guilty.

Two coaches of the Samjhauta Express, or Friendship Express, were engulfed in flames after the blasts in 2007 outside Dewana, a train station near New Delhi.

The train was traveling from New Delhi to Atari, the last station before the Pakistan border. At Atari, passengers switch to a Pakistani train.

Pakistan has been pressing India to expedite the trial.