Police are investigating after a Victorian Liberal MP accused a colleague of assault, in the latest controversy to strike the state party.

The incident involved a man and a woman, both of whom are current Victorian Liberal MPs, according to newspaper reports.

Victoria Police confirmed officers were investigating an alleged assault at an event in Sunshine West on May 23.

“It was reported a woman was assaulted by a man at an event held at a function venue on Somerville Road,” they said.

The woman left following the incident and did not require medical attention.

She reported it to police on June 16.

The allegation comes five months out from the Victorian election, where the state Coalition seeks to turf out a three-term Labor government while also faces a surging One Nation.

The Liberals in Victoria have been rocked by scandals, including former deputy leader Sam Groth leaving his Mornington Peninsula seat of Nepean.

The first-term MP said the public pressure placed on his family had been significant, claiming that some of that had come “within my own party”.

Groth’s departure triggered a byelection in May, six months out from the November state election.

Meanwhile, a court battle continues after Liberal MP Moira Deeming successfully sued former leader John Pesutto for defamation after he implied she was associated with neo-Nazis.

Pesutto was ordered to pay $2.3 million in legal costs to Deeming. He faced bankruptcy, which would have forced him from parliament.

The state Liberals’ administrative committee agreed to loan Pesutto $1.55 million, but committee member Colleen Harkin and four others on the committee sought to block the payment over an alleged breach of party rules.

They launched a Supreme Court challenge, which remains active.

Harkin has since defected to One Nation.

Deeming was also ousted in preselection in her Western Metropolitan upper house seat before she was sensationally re-endorsed unopposed.

Successful challenger Dinesh Gourisetty was forced to step aside for previously providing a character reference for a now-convicted child sex offender.

-AAP