In a statement Adnan and Arsalaan Habib's family described the brothers as their "family's precious jewels, spreading joy wherever they went".
The statement added: "They were happy and joyous boys who were a central part of the family, always smiling and bringing smiles to everyone they met."
More top news
An improving story through Monday. A dry spell then develops for the week ahead. Here's your NW forecast for the next few days
The McCanns said they will do "whatever it takes for as long as it takes" to find their daughter, ten years after her disappearance.
A mild night with winds strengthening. A windy day on Sunday with sunny spells and warmer air. Kerrie has the detail......