A 16-year-old boy has been arrested on suspicion of murdering Lindsay Birbeck, who went missing on August 12.
The teaching assistant, 47, was found dead by a member of the public in Accrington Cemetery, Lancashire, at around 8pm on Sunday.
She was last seen alive around 4pm in the nearby village of Huncoat and died as a result of strangulation, police said after confirming her identity today.
Detectives arrested the teenage suspect from Accrington who remains in custody.
Detective Supt Andy Cribbin, said: ‘The response to our earlier appeal has been absolutely overwhelming and I would like to thank everyone who has come forward with information.
‘While we have made an arrest our inquiries are very much continuing and I would continue to appeal for anyone with information to come forward.
‘However, I would urge people not to speculate and to be mindful of the comments they make, especially on social media, as this causes distress to the family and could impact on our investigation.’
The disappearance of Ms Birbeck, from Huncoat, prompted wide ranging searches by hundreds of members of the public.
Earlier on Tuesday, police released CCTV images of a suspect walking along Burnley Road towards Accrington with a blue wheelie bin at about 2.30pm on August 17.
A bin similar to the one in the footage was found near the scene where Ms Birbeck was discovered, police said.
A large team of detectives have been working on the case since Saturday.