Mountain rescue volunteers have joined other specialist teams and hundreds of police officers in the frantic search for the missing child of runaway couple Constance Marten and Mark Gordon.
Police announced yesterday that the couple had been re-arrested on suspicion of gross-negligence/manslaughter.
More than two hundred police officers were involved in the search for the pair's two month old child in open land in north Brighton on Tuesday.
More officers and search volunteers will search 91 square miles of land today.
Police search teams in Roedale Valley Allotments, Brighton
PA
Detectives said they still had hope that the infant might be found alive, but that every passing hour made the child's predicament more precarious.
Overnight temperatures dipped towards freezing in the area for a second day.
Constance Marten and her partner Mark Gordon were arrested on Monday night, initially on suspicion of child neglect.
They were re-arrested on suspicion of gross-negligence/manslaughter yesterday afternoon, after detectives revealed the couple had not been cooperating with their inquiry.
Detectives revealed the couple had not been cooperating with their inquiry
PA
The pair went on the run after their car broke down and caught fire on the M61 near Bolton on January 5.
A forensic examination of the vehicle revealed Constance had given birth in or near the car a day or two earlier.
The couple were spotted at various locations in Liverpool, Essex and London in the days after, before heading to Sussex.
They were finally detained after a sharp-eyed member of the public spotted them in a shop in north Brighton and dialled 999.