Jayden Parkinson murder: Police ask public to 'refrain from searching'
Police searching for a missing teenager have called on the public to "refrain from carrying out their own searches".
Officers are treating the disappearance of Jayden Parkinson, from Oxford, as murder. The 17-year-old was last seen on Tuesday, 3 December.
Thames Valley Police say the public's efforts risk "jeopardising their own investigations".
Police confirmed searches are being concentrated in two locations in the village of Upton and nearby Didcot.
No body has been found but officers confirmed on Saturday they were treating Jayden's disappearance as murder.
A 22-year-old man from Reading and a youth of 17, from Oxfordshire, remain in custody after being arrested on suspicion of murder.
Jayden was last seen on CCTV at 16:07 GMT on 3 December boarding a train at Oxford railway station to Didcot Parkway.
Supt Christian Bunt called on the public to resist searching for Jayden themselves, to avoid any risk of "jeopardising the investigation".
He said: "We understand the effect our police presence has had on a number of Oxfordshire communities.
"The public really want to help us with our inquiries and we have had a number of direct offers to help with the search.
"But, this is a critical time in our operation and I would ask the public to refrain from searching at the moment.
"We're concentrating our efforts on two areas; one is in the village of Upton, which is quite an extensive search area, the other is in the Lydalls Road area of Didcot, a more suburban area, which will cause quite a bit of disruption.
"There's lots of resources attached to this operation, but it's also important to note the family are receiving support from specialist officers."
Detectives previously said a man seen "struggling" with a suitcase may hold the key to the disappearance.
Police want to trace the man who was seen in Upton at 02:00 GMT on Monday.
The same man was seen in nearby Didcot around half an hour later.
Det Ch Supt Andy Murray said: "That suitcase was large, it was heavy, it was difficult to manage and that man was having difficulty removing that suitcase from that area."
The man is described as white, aged about 20, around 5ft 7in (1.70m) tall with a slim or medium build and short dark hair. He was wearing light-coloured jeans.
The case is described as being of light-coloured canvas, possibly pale blue.