A police officer is in custody after handing himself in to detectives investigating the suspicious disappearance of an ex-Network Ten reporter and his flight attendant partner.

Beau Lemarre, 29, a NSW police officer and former-celebrity blogger, arrived at Bondi police station shortly after 10.30am Friday after a frantic overnight search.

“The man will be transferred to Waverley police station, where investigations will continue,” NSW Police said in a statement.

Detectives had been looking for Lamarre following the disappearance of former Ten reporter Baird, 26, and Qantas flight attendant Davies, 29, who have not been heard from since Monday.

Their disappearance is being treated as suspicious after possessions belonging to both men were found in a skip bin in the southern Sydney suburb of Cronulla on Wednesday.

That discovery led police to Mr Baird’s blood-smeared share house, about 30km away in inner-city Paddington.

Police have been trying to track down Lamarre, who previously dated Baird.

“Detectives are looking at a line of inquiry that a third person may be able to assist with the investigation,” NSW Police said in a statement eariler on Friday.

Lamarre was a celebrity blogger before joining the police. Photo: Instagram

Officers executed a search warrant and “seized a number of items” from a home at Balmain, in Sydney’s inner west, about 11.30pm on Thursday.

Property records reportedly indicate the home was purchased under the name Lamarre.

Neighbours heard shouting at Baird’s Paddington home on Monday, but the incident was not reported to police until they arrived at the scene two days later.

Blood was found at the property, indicating someone had suffered a significant injury at the site, police said.

Baird’s WhatsApp account was active as late as Tuesday night, leading detectives to appeal for him to come forward if able.

“If Jesse’s seeing this, we’d ask him to contact us, as well as anyone that might know the whereabouts of Jesse,” Detective Superintendent Jodi Radmore said on Thursday.

Police seized items from a Balmain home in their search for Baird and Davies. Photo: Instagram

But she said investigators were open to the possibility someone else was involved in the double disappearance.

Police later said inquiries had led them to believe a third man may be able to assist with the investigation.

Lamarre, who up until days ago had an active social media presence, joined the police force in 2019.

Photos posted online show the former celebrity blogger posing with dozens of A-listers including Taylor Swift, Selena Gomez, Katy Perry, Miley Cyrus and Harry Styles.

During a 2014 Lady Gaga concert, Lamarre threw a note at the singer describing her as his “saviour”.

Gaga read the note aloud, which said: “through your music, you have helped and will continue to set free many people … Gaga, you’re not just my idol but literally my saviour.”

Footage of the recently graduated officer tasering a man at close range in Darlinghurst went viral in 2020, prompting an internal review.

An investigation later cleared him of any wrongdoing.

Baird previously worked as a presenter on the morning program Studio 10, while lately he had taken to the field as a goal umpire for AFL and VFL games.

Photos from his and Davies’ social media accounts show the couple together at a Pink concert in Sydney during the week before their disappearance.

– with AAP