A man accused of creating a disturbance at Sydney Airport — where a police firearm was discharged in a struggle with officers — has been charged with more offences 24 hours after being released on bail.

Nicholas Teplin, 41, has been charged with allegedly assaulting several people at Central train station after being released from custody on Wednesday.

Mr Teplin had been charged with creating a disturbance at an airport and hindering a Commonwealth official.

A train at a platform at Sydney's Central Station

Police were called to Central train station in Sydney’s CBD following reports a man had allegedly assaulted two men. (ABC News: Liam Patrick)

Police allege on Wednesday Mr Teplin was involved in a struggle with Australian Federal Police officers during his arrest inside the domestic terminal of Sydney Airport, which resulted in a police gun discharging.

He fronted court that day and was granted conditional bail.

Police allege Mr Teplin on Thursday approached a 45-year-old man on the train station’s concourse at about 4.40pm and punched him in the face.

An empty Sydney airport food court area, with police tape across the scene.

The incident at Sydney airport occurred on Wednesday morning. (ABC News: Ethan Rix)

The man was left with a bloodied nose and collapsed to the floor, police said.

Soon after, police allege, Mr Teplin is accused of approaching two more men and striking them in the head.

“The man continued towards a fourth 20-year-old man and allegedly attempted to grab his bag from his shoulder,” NSW Police said in a statement on Friday morning.

Operation underway after police gun fired at Sydney Airport

The Australian Federal Police said officers responded to a request for assistance from an airline at Sudney Airport after the man was “acting suspiciously” this morning.

“As the men continued to struggle over the bag, police from Sydney City Police Area Command attended and arrested the man.

“Whilst in police custody, the man allegedly assaulted a male constable by pushing him in the chest.”

He was charged with hindering police, affray, assaulting police, assaulting occasioning actual bodily harm and common assault.

On Friday, Police Minister Yasmin Catley said the man’s alleged actions were “beyond belief” and that the decision for bail was “made by magistrates”.

“The NSW Police have acted very, very, swiftly,” she said, thanking attending officers.

Mr Teplin is expected to face court on the new charges on Friday morning.