A mother and father who went missing with their newborn baby have been found and arrested, police say, although the baby is still missing.

Sussex Police said that Constance Marten and Mark Gordon were spotted in Brighton by a member of the public just before 9.30pm on Monday.

They were arrested and are in police custody.

Their baby is still missing, however, and an urgent search operation is underway in the area, police said.

Marten and Gordon were reported missing after their car broke down near junction four of the M61, near Bolton, on Thursday 5 January.