Concern for missing Immingham father and twin sons
Police are growing concerned for a man and his six-year-old sons who have not been seen since he took them to Europe.
Andrew Wall, 40, and twins Liam and Ciaran were reported missing by the boys' mother last Tuesday. Police are treating the case as child abduction.
Mr Wall, from Immingham, North East Lincolnshire, and his sons were last seen arriving in Brussels on Wednesday.
Humberside Police said Mr Wall had "personal problems" but the boys were not thought to be in danger.
Mr Wall and his sons, who all live with the boys' mother, were reported missing after they failed to return from a trip to Sheffield.
They are known to have boarded a Eurostar train in London at 1730 BST the next day and arrived in Brussels two hours later.
Det Supt Dena Fleming would not give details of the problems Mr Wall is facing.
She said: "We would want to speak to him about them, he knows what they are.
"They're not something that can't be resolved and it's not something that should keep him away from his children or his family."
Mrs Fleming said she was treating the case seriously "because for a parent to take their child or children out of the country when they are not married and they don't have their partner's consent is a child abduction".
She said: "We don't have any intelligence that says Andrew will harm his children. He was simply a doting dad before he left with the boys.
"He's now broken off all contact with his partner and my concern is that he will run out of money and we don't know what will happen then."
Mr Wall is described as white, about 6ft 5in tall, of heavy build with dark brown, receding hair and a moustache.
Liam is about 3ft 5in tall, of small build with black hair.
Ciaran is about 3ft 6in tall, of small build with blonde hair.
Both boys were last seen wearing T-shirts with black tracksuit bottoms and Aston Villa Football Club jackets.