Controversial Sydney businessman Salim Mehajer has been charged with slamming a television reporter in the door of a Porsche, hours after he allegedly assaulted a taxi driver in an incident outside The Star casino.

The former Auburn deputy mayor was attempting to flee a media pack when he aggressively pulled shut the door of a white Porsche as the reporter was standing talking to him between the open door and the body of the car.

With cameras rolling, the female reporter was violently crunched between the car and the almost closed door, reportedly injuring her hand. The white Porsche was filmed driving away.

The assault charge involving the reporter was Mr Mehajer's second run-in with police in a bizarre 24-hour period for the property developer.

Hours earlier he was charged with assault occasioning actual bodily harm after he allegedly assaulted a taxi driver outside The Star casino on Sunday morning.

He was also charged with larceny for attempting to steal the driver's EFTPOS machine and mobile phone.

Police were called to The Star casino in Pyrmont about 4.30am on Sunday after it was reported a man allegedly stole an EFTPOS machine and mobile phone from the taxi he was in before assaulting the driver. The 38-year-old driver also injured his nose.

Officers from Sydney City Local Area Command later arrested a 30-year-old man, identified as Mr Mehajer, at the intersection of William and Bourke Street, Darlinghurst.

He was taken to Day Street Police Station and charged with assault. He was given conditional bail and is due to appear before Downing Centre Local Court on April 26.

Mr Mehajer left Sydney City Police Station on Sunday afternoon and tried to escape waiting reporters in a taxi, but the driver cancelled the fare during the ruckus.

A police officer came out of the station and ordered the 30-year-old out of the vehicle.

Late last night, police said they had charged a 30-year-old man after he allegedly used the driver's door of a Porsche to assault a 30-year-old television reporter in James Lane, injuring her hand.

While Mr Mehajer is yet to make any official statements about the allegations against him, he did take to social media overnight posting a video filmed off a mobile phone that allegedly shows a senior member of the NSW Police flipping someone the bird.

"Appalling behaviour by the Senior Constable in charge of today's "allegations"," Mr Mehajer wrote in a post to Instagram.

"Sir, place a million cameras in front of me and all you'll see is my smile."

Mr Mehajer was slapped with a four-month suspension from council in January last year after failing to inform other councillors that he owned a building in Auburn when debating whether the area should be rezoned.

He has emphatically denied lobbying a councillor to change his vote to help him win a multi-million dollar property contract.

Mr Mehajer faced questions into alleged misconduct by the now-defunct Auburn council during an inquiry in June last year.

A number of former Auburn councillors, including Mr Mehajer, were accused of making planning and development decisions to benefit themselves or their families, before the council was sacked last February.

Mr Mehajer again came under fire mid-last year after videos surfaced showing him threatening to rape his estranged wife and her parents.

He dismissed the footage as not "real news" after A Current Affair revealed the two videos apparently filmed by himself from within a car and sent to his former partner, Aysha Learmonth, whom he married in a lavish ceremony last year.

In one video he screams into the camera: "Aysha, you've got five minutes to give me a call. If you don't call me in five minutes I'm going to rape your mum. Your mum and your f---ing dad. Call me now."

In the second video Mr Mehajer speaks in Arabic and continues to yell abuse at Ms Learmonth.

The footage was aired days after Mr Mehajer made headlines for a bizarre motivational video posted to his Facebook page that shows him driving a Ferrari and a voiceover asking viewers if they want to become "an inspiration" and "make it to the top".