On Monday at around 9.40 a.m., Yousuf Ahmad, 13, and Muhammad Ahmad, 10, were last seen at their Liversedge, West Yorkshire, home.

West Yorkshire Police say they think the boys are together.

"Given their young ages and the length of time they have been missing, we remain very concerned for Yousuf and Muhammad, and we urgently need to locate them," stated Detective Inspector Rob Dicorato.

"We are carrying out extensive enquiries to find them and would like to hear from anyone who has seen them or who has any information that could assist."

Yousuf is described as being about 5ft 6in tall and wears glasses.

West Yorkshire Police said when he was last seen, he was wearing a Lyle & Scott grey hoodie, North Face trousers and black trainers.

Muhammad is about 4ft 7in tall and wears square glasses.

He was last seen wearing a black hoodie, grey tracksuit bottoms, and black trainers with a white stripe.