Tyler Jackman, aged 11, Zeah Jackman, seven, Marley Jackson, six and two-year-old Zinayah Jackman are believed to be with their father Zion Jackman and their grandmother Una Nolan. Police say they were last seen on Thursday September 16.
They were last spotted leaving an address in Islington, north London, but they have also links to Essex and the West Midlands.
As My London reports, Detective Inspector Paul Ridley, from the Met Police’s north area public protection unit, who is leading the investigation, is now appealing for assistance from the public to help locate the kids.
Detective Inspector Ridley said: “It is absolutely crucial that we ensure the welfare of these young children. If you have seen them since their disappearance or know of their current whereabouts it is imperative that you come forward and tell my investigation team.
“My key priority is guaranteeing the safety of the children. Robust action will be taken if we become aware of any person intentionally assisting or facilitating their continued disappearance.
“I would encourage any person who wishes to come forward anonymously to do so. I can assure you that all information provided will be immediately followed up.”
Anyone who sees the children should call 999.
Anyone with other information on their whereabouts should call police on 101, or the Missing People charity on 116000, giving the reference number 21MIS027940.
Information can also be provided to Crimestoppers, anonymously, on 0800 555 111, or online at the Crimestoppers website.