NEW DELHI - The Bombay High Court on Monday acquitted the 12 persons convicted, including five on death row, in the 2006 Mumbai train blasts case that killed 189 people and wounded over 800 others, officials said.

The high court held that the prosecution had utterly failed to establish its case against all the accused and set aside the Sept 30, 2015, judgment of the special Maharashtra Control of Organized Crime Act court after finding no evidence to uphold the guilty verdict.

"The prosecution has utterly failed to prove the case against the accused. It is hard to believe that the accused committed the crime. Hence, their conviction is quashed and set aside," the Bombay High Court said.

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Questioning the trustworthiness of certain prosecution witnesses and the Test Identification Parade of some of the accused, the court ordered the release of the convicts if they are not required to be detained in any other case.

The court also said that the explosives, arms and maps recovered during the investigation appeared to be unrelated to the blasts. The prosecution, it said, could not even prove what kind of bombs were used in the blasts.

On July 11, 2006, seven bombs exploded within 10 minutes during the evening rush hour on trains in Mumbai, the financial and entertainment capital of India, leaving 189 dead and over 800 wounded.

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The bombs exploded near the stations of Matunga Road, Mahim Junction, Bandra, Khar Road, Jogeshwari, Bhayandar and Borivali.

A trial court in 2015 convicted 12 people in the blasts case.