WA govt leaker facing expulsion

WA environment minister Stephen Dawson is "very disappointed" government information from a two-day caucus retreat in Perth last week has been leaked, but says the culprit could face expulsion from the Labor party.

"I'm disappointed to think that information from that event may have found its way to the media," he told reporters on Sunday.

"The premier has indicated over the past couple of days that if somebody is intentionally leaking this stuff then they will face expulsion from the party."