Israel has released its official report on its flotilla raid that occurred in May.

Nine pro-Palestinian activists died and ten Israelis were wounded in the incident.

"We found that there were some professional mistakes regarding both the intelligence and the decision-making process and some operational mistakes," the report's author, retired general Giora Eiland, told reporters at a Israeli defense ministry briefing where declassified sections of the report were discussed.

However, investigators say there was no major failure in the showdown at sea.

The lead investigator says Israel's navy should have had a backup plan for stopping the ship when it was discovered the activists on board were violent.

The 100-page report also faults military intelligence for not targeting the Turkish organizers of the flotilla, who had ties to terrorist groups.

The report didn't recommend any dismissals, but it is possible that some senior officer will be demoted or ousted in a looming shake-up.