Partner of missing Melbourne mum Ju 'Kelly' Zhang charged with her murder

The partner of missing Melbourne mother Ju 'Kelly' Zhang has been charged with her murder.

Joon Seong Tan, 35, was arrested at Tullamarine Airport about 6.15 on Wednesday night, allegedly trying to flee the state.

The arrest comes ten days after Ms Zhang's disappearance as ongoing investigations continue by police from the Missing Persons Squad, who spent today scouring a creek in Melbourne's inner north-east as part of their search.

READ MORE: Grave concerns for missing Melbourne mother

Tan was previously arrested by police on Sunday afternoon and was later released without charge after 24 hours of questioning.

He earlier told police he last saw Ms Zhang outside her Epping home on Winchester Avenue about 5.30pm on Monday February 1, when the 33-year-old mother said she was going for a walk.

Ms Zhang, who hasn't been seen since, was believed to be wearing a pink nightgown and possibly pink slippers.

She did not have any personal belongings with her and police said her mobile phone was missing.

The phone was last active in the street, with a public appeal urging anyone who potentially finds it to contact police.

Police have also urged residents from Ivanhoe West, Epping and Doncaster to check their CCTV footage from the afternoon Ms Zhang went missing.

Investigators also want to speak to anyone who witnessed "suspicious activity" near Darebin Creek Reserve, near Seddon Reserve in Ivanhoe West on February 1 and 2.

Mr Tan is expected to face Melbourne Magistrates' Court on Friday.

Anyone with information should contact Crime Stoppers on 1800 333 000 or www.crimestoppersvic.com.au