OTTAWA - A Commission of Inquiry into the investigation of the bombing of an Air India flight in 1985 has completed drafting its final report.

But the Commission said in a statement Tuesday there is much work remaining before the report is submitted to the prime minister. That work includes editing, translation, submission for a National Security Review and formatting before it can be sent for printing.

The bombing of the aircraft off the Irish coast killed 329 people, including 280 Canadians, making it the largest mass murder in Canadian history.

The flight originated in Toronto and had stopped at Montreal before heading to London and Bombay.

Fifteen years after the bombing, on Oct. 27, 2000, the RCMP arrested two men on 329 counts of first-degree murder.

Nearly five years later, on March 16, 2005, a B.C. Supreme Court judge found Ripudaman Singh Malik and Ajaib Singh Bagri not guilty on all counts.

The commission says the report will be published in five volumes and the pre-publication work "will be completed as expeditiously as possible."