Adelaide brawl: Wild moment foul-mouthed punch on erupts on Adelaide train in front of horrified passengers

Shocked commuters watched on as a vicious brawl broke out on a suburban train during evening rush hour.

The fight broke out between two men on Adelaide's southern Seaford line on Friday at about 6.45pm after some verbal sparring.

CCTV footage showed a man in a hooded orange pullover take a number of round-arm punches at another man's head. 

'I'm a f***ing beast and you aren't, so f*** off,' the man in the orange top shouted.

'F*** off man, you ain't s***, if you ain't trained then f*** off.' 

Terrified passengers looked on as a third man became involved and held the man on the receiving blows in a headlock while the third person continued his attack.

A woman then intervened by pressing the emergency stop button while telling the men to 'get off, stop it'. 

The men exited the train at Oaklands Railway Station in Adelaide's south-west.  

South Australian transport minister Tom Koutsantonis has vowed to find the men and ban them from taking public transport for life.

'They're idiots,' Mr Koutsantonis told 9News on Friday.

'We cannot tolerate assaults on public transport, we have zero tolerance for it.

'I'll ban them for life, absolutely.'

Roaming security patrols on Adelaide do not start until 7pm and members of the public have called for this to be extended to more standard commuting hours. 

'I think to the peak time would be better,' one commuter said.

'It'd be good to have them during peak hours like 5pm,' another commuter said.

Police have been called in to investigate the incident and are reviewing the CCTV footage.

Mr Koutsantonis said there was a good chance the men could be identified.

'We've got their pictures, we possibly even have their credit card details and we are forwarding this all on to police,' he said.