Dog walkers said large swathes of the forest were cordoned off (Picture: PA)
Mountain rescue teams have joined the search for the baby of Constance Marten and Mark Gordon.
The couple was arrested in Brighton on Monday night.
They were detained on suspicion of child neglect and remain in police custody after nearly two months on the run.
Teams are now desperately scouring a large area between Brighton and Newhaven to try to find the infant, who has not had any medical attention since birth in early January.
Mark Gordon and Constance Marten were arrested on Monday night (Picture: Shutterstock)
Police officers and teams from London Search and Rescue at Wild Park Local Nature Reserve today (Picture: PA)
This morning, officers from London Search and Rescue could be seen in orange hi-vis jackets searching Moulsecoomb Wild Park.
The wooded nature reserve is around a mile from where Marten and Gordon were arrested.
Officers, some wearing jackets indicating they were dog handlers, searched underneath sticks and logs close to where the area meets Hollingbury Golf Course.
A uniformed officer was seen standing guard at the entrance to the park, with dog walkers saying they saw police tape cordoning off parts of the woodland.
More than 200 officers have been urgently searching an area of seven miles by 13 miles for the baby (Picture: PA)
Mark Gordon and Constance Marten evaded capture for weeks on end (Picture: PA)
In a press conference yesterday, police said they still ‘hold hope’ that the missing baby is still alive, but have warned ‘risk to the child is extremely high’.
A Met Police spokesperson said: ‘Whilst we hold hope that the baby is still alive, we agree that the risk to the baby is extremely high.
‘More than 200 officers have been engaged in the search and officers arrived within 6 minutes after the 999 call yesterday that led to the arrests of Constance Marten and Mark Gordon.’
Police have also searched every shed at the Roedale Valley Allotments near where Marten and Gordon were arrested and will remain on site for some time.
An entry on the allotments society Facebook page said officers had forced entry to outbuildings as the hunt for the two-month-old baby continues.
A huge search focused on Roedale Valley Allotments in West Sussex (Picture: PA)
Locals have been urged to remain ‘vigilent’ in aiding the search (Picture: PA)
The couple had avoided police since the infant was born in early January.
They moved around the country, paying for everything in cash and covering their faces when on CCTV.
But a tip-off led to them being detained at around 9.30pm on Monday by officers from Sussex Police in Stanmer Villas.
CCTV footage had showed Marten and Gordon walking past a row of houses in Brighton, both with their hoods up, prior to their arrest.
A neighbour told The Sun the ‘suspicious’ couple walked by her house at 8.40pm with no shopping bags, then returned at 9.25pm carrying two bags of food from a shop.
Walking behind Marten, Gordon can be seen carrying what appears to be a large metal pipe, and can be heard ‘shouting’ at her.
The baby’s parents were arrested on Monday after nearly two months on the run.