Australian Secret Intelligence Service officers breached weapons-related rules three times over the past year, including one incident in which a gun was accidentally discharged, a new report shows.

The Inspector-General of Intelligence and Security oversees Australia's spies, including ASIS agents whose job is to collect intelligence from overseas.

The latest IGIS report tabled in parliament on Friday found an ASIS officer accidentally discharged a weapon during a training session.

The weapon was fired in a safe direction and there were no injuries or damage, but Comcare was notified.

In another incident, ASIS officers and defence force personnel took part in weapons training without the proper authority in place.

However, as soon as it was realised the training had not been approved it was halted while the issue was sorted.

In another incident, ASIS officers took part in weapons training at a weapons range which had not been approved by the agency.

The report also revealed ASIS had accessed an electronic device in August 2017 without the consent of the owner, but no criminal charges were laid after the agency apologised.

ASIS was also taken to task for not immediately telling the then Foreign Minister Julie Bishop that foreign intelligence in a report had been collected by another agency without proper authority in breach of Australian law.