Terrain hinders police search for Raoul Moat

Temporary Chief Constable Sue Sim said the sprawling countryside offered many opportunities for the former doorman to hide.

Speaking at a press conference today, she said the focus of the search remained on moorland around the village of Rothbury.

Mrs Sim said: "I have outlined how challenging the terrain is. This is a beautiful part of Northumbria but it is extremely difficult to search.

"The area is full of hills, caves, ravines, dense woodland and deep water. This search will take time and we must protect those involved."

Police forces from across Britain have flooded Northumbria with marksmen, trained search officers, dog teams and specialist vehicles.

Scotland Yard sent around 40 armed officers from its CO19 unit, including snipers armed with high velocity rifles and telescopic sights.

Police officers have refused to confirm speculation that SAS officers have joined the manhunt.

The Police Service of Northern Ireland has sent a fleet of armoured vehicles to offer protection to unarmed officers on patrol.

Police continue to check remote farmhouses and outbuildings for signs of Moat, who abandoned a tent and other equipment earlier this week.

Officers wearing protective vests and helmets were patrolling Rothbury while colleagues keep look out from natural vantage points.

An exercise on the Otterburn military range was briefly suspended today as police searched one property.

Investigators have also drawn on the hands-on experience of members of the National Search Centre.

Mrs Sim said the Serious Organised Crime Agency (Soca) and military were offering tactical advice.

She added: "I spoke to many of my officers in the area yesterday. Their determination and focus to bring this to a conclusion remains unwavering."