It did not take much for WA Labor MPs to start pointing the finger at each other.

After the release of a couple of largely innocuous documents and a picture of a whiteboard that was impossible to decipher, the hunt is on within the party to determine who is responsible for a stream of leaks to the Liberals.

The latest leak — the aforementioned whiteboard picture, taken from inside a gathering of Labor's caucus — has raised the prospect that a member of Parliament was behind the leaks.

It also illustrated, beyond doubt, that the McGowan Government has a problem with someone working to undermine it.

But the problem which could be even bigger for Labor has been the rush to point fingers.

Colleagues have been quick to try to blame each other, privately at least, with suggestions the leaker is one of a handful of disgruntled MPs.

Some parliamentary colleagues even privately suggested Margaret Quirk and Tony Buti — who were both overlooked for ministerial positions — as possibilities.

But those assertions have come seemingly without any evidence to support them.

In other words, just six months into their time in government, Labor MPs have been willing to make damaging claims about parliamentary colleagues in private without providing anything to back up their assertions.

For the record, both Ms Quirk and Mr Buti have vehemently rejected suggestions they were involved.

One of Ms Quirk's factional colleagues, Police Minister Michelle Roberts, also had stern words for those looking to point the finger.

"It's very hurtful to people like Margaret, who has been a loyal party member for 30 years," Ms Roberts said.

"It is ridiculous to put her under suspicion."

Anger from on high for traitor

Few would dispute the notion that someone within Labor leaking to the party's direct political opponents represents treachery, a view expressed by several cabinet ministers.

Education Minister Sue Ellery expressed bemusement that someone would attempt to hurt the McGowan Government, just six months after a landslide election win, while Labor is still enjoying what is essentially a political honeymoon.

The leaks from within are frustrating senior Labor MPs like Sue Ellery. ( ABC News: Jacob Kagi )

"[This is] at a time when WA Labor's stocks have never been higher and the Opposition has never been more irrelevant," Ms Ellery said.

The leaking appears to have undermined internal trust and has understandably caused alarm, but some believe the party has not helped itself with its response either.

As yet, no serious political damage has come from the leaking as the Liberals are yet to receive any truly useful information.

Despite that, the Premier's office and Labor State Secretary Patrick Gorman responded on the weekend with threats to call in police and expel whoever was responsible from the party.

Some within the party believe that angry response — which boosted the story to front page news on Saturday — only made things worse.

It is perfectly understandable why Premier Mark McGowan and senior Labor figures are angry, given one of their own is apparently trying to undermine their work.

The leaking looks to have damaged trust within the party, and that is clearly a bad outcome.

But Labor's response has given the story legs and led to hurtful, anonymous accusations being made about MPs — neither of which are likely to help.