India’s Minister of Railways announced on Sunday that the causes and parties responsible for India’s worst rail disaster in decades have been identified.

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“We have identified the cause of the accident and the people responsible,” India’s Minister of Railways Ashwini Vaishnaw told ANI news agency on Sunday. He added that it was “inappropriate” to release further details before a final investigative report.

The provisional toll from a collision between three trains that occurred Friday near Balasore, in the eastern state of Odisha, reported at least 288 deaths.

According to the Minister, “the changes that occur during electronic interlocking are the origin of accidents”, referring to the complex series of signals that regulate traffic on the rails to prevent train collisions.

The culprit and the manner in which the accident occurred will be known after a proper investigation, he added.

Confusion is rampant at this stage, but every day Indian Timeciting a preliminary investigation report, saying “human error” may have caused the collision between the three trains, one of the worst rail disasters in the country’s history.

The Coromandel Express, which links Calcutta to Madras, was given the green light on Friday to operate on the main line, but was diverted due to human error on a line that was already carrying freight trains, according to the newspaper.

The passenger train then rammed into the freight convoy at around 130 km/h. Three carriages then fell onto the adjacent track, hitting the back of an express train operating between Bangalore and Calcutta. It was this collision that caused the most damage, he added Timeciting the initial report.

Odisha State Chief Secretary Pradeep Jena confirmed that around 900 injured people had been taken to hospitals.