Brandon John Serafin-Gray in court over Walkervale knife incidents

A Brisbane man has been denied bail after being accused of a terrifying rampage where youths were threatened with a knife.

A 29-year-old Brisbane man has had a bid for bail denied in Bundaberg Magistrates Court.

Brandon John Serafin-Gray faced court on Tuesday, but his case was adjourned so mental health advice could be sought.

On Wednesday, Serafin-Gray appeared by videolink where his bid for bail was denied.

Bundaberg detectives allege Serafin-Gray committed eight offences when he threatened a number of people in the early hours of Saturday, April 23, in the Bundaberg suburb of Walkervale.

Police allege Serafin-Gray ran at a car with a knife and then terrorised two teenagers, chasing them and holding the knife to the throat of a 15-year-old girl before they flagged down help from a passing ambulance.

They also allege that at about 12.45am a 32-year-old man was driving his car on Walker St when the accused ran at the car.

The driver stopped, but when he saw the accused had a knife he accelerated away and phoned police.

A man has been denied bail after a series of alleged incidents involving a knife in Bundaberg.

Then, about 12.55am a 15-year-old girl and 15-year-old boy were walking on Maryborough St when they were allegedly approached by Serafin-Gray, who was holding a knife.

They had a brief conversation but kept walking before running.

Police allege he chased them along Walker Street and the girl attempted to hide from him in some bushes.

It’s further alleged he held her by the neck, threatening her with the knife before walking east along Walker St with her.

The 15-year-old boy returned and approached Mr Serafin-Gray who allegedly then released the girl.

The girl fled again and Mr Serfain-Gray allegedly chased the boy who ran before both teenagers sought help from a passing ambulance.

Brandon John Serafin-Gray, 29, has been denied bail court over a knife incident in Walkervale where he was charged with three counts of going armed so as to cause fear, two counts of threatening violence, and one count each of assault, kidnapping and unlawful entry of a vehicle.

Meanwhile, about 3.15am a 42-year-old woman was at the back of her open van in Walker Street when she was also allegedly approached by the same man who threatened her with a knife.

She ran to the driver’s door and got into the van and the man allegedly got into the passenger seat.

The woman fled and phoned police.

Police found Serafin-Gray on Walker St.

Serafin-Gray stands charged with one count of common assault, three counts of going armed to cause fear, two counts of threatening violence at night and one count of unlawful entry of a motor vehicle for committing an indictable offence while armed at night.

His case will be mentioned again on June 7.