The former Morrison government has been accused of undermining the integrity of Operation Sovereign Borders after a report confirmed it instructed the Department of Home Affairs to publicise the interception of an asylum seeker boat on election day for political purposes.

A review by departmental secretary Mike Pezzullo released Friday afternoon by Home Affairs Minister Clare O’Neil clears the department of any wrongdoing, but fingers both then-prime minister Scott Morrison and home affairs minister Karen Andrews.