Authorities express "serious concerns" regarding the disappearance of a television presenter and his partner under suspicious circumstances in Sydney.

Belongings belonging to former Network 10 host Jesse Baird, 26, and Luke Davies, 29, were discovered on Wednesday in a bin in a Sydney suburb.

Local media identified a former police officer, who was previously in a relationship with Mr. Baird, as a person of interest sought by the police for questioning. However, the authorities could not confirm the individual's identity.

On Thursday evening, law enforcement officials obtained a search warrant for a residence in Sydney's Balmain area, where they confiscated several items.

In a statement, the New South Wales Police Force said, "Investigators are pursuing leads indicating that another individual may possess information relevant to the investigation. Efforts are currently underway to locate this individual."

Police discovered blood and signs of furniture displacement at Mr. Baird's residence in the Paddington area, approximately 28 km (17 miles) from Cronulla, where a member of the public discovered the couple's belongings in a bin.

Among the recovered items were bloodstained clothing, a cell phone, and credit cards. Authorities suspect that the couple visited Paddington on Monday, with CCTV footage from 7NewsAustralia purportedly showing them entering Mr. Baird's shared apartment.

CCTV footage showing a white van in the area was also being looked at by police, the news outlet said.

Qantas flight attendant Mr Davies has not been in contact with his family or attended work since Monday, according to police.

Det Supt Jodi Radmore said all lines of inquiry were being investigated and told reporters: "We do believe, from the crime scene at Paddington and property located at Cronulla, that there has been some sort of incident."

She added that had given the force "great concerns for one, possibly both their safety".

"Witnesses described a verbal argument," she continued, "but it wasn't reported to police at the time ... it was only reported to police yesterday [Monday morning] during canvassing."

New South Wales Police are appealing for information.

Mr Baird had been a presenter and red carpet reporter on Network 10's morning show Studio 10 until the show was axed in December.

Qantas said it was providing support to Mr Davies' colleagues.

"Our thoughts are with family, friends and colleagues of our crew member at this very difficult time," the airline said in a statement.

Too bad