A man arrested in connection with the brutal murder of Saudi Arabian student Nahid Almanea has been released, police said.
The 52-year-old man has been positively eliminated from enquiries, Essex Police said.
Nahid, 31, died after she was stabbed 16 times as she walked along a path in Colchester, Essex, on Tuesday morning.
She had been studying an English language course at the University of Essex as part of her studies for a life sciences PhD.
A man cleared of murdering two young women is to be re-tried, prosecutors said.
Angus Sinclair, 68, was indicted for the 1977 murders of Christine Eadie and Helen Scott.
The two 17 year-old girls were last seen leaving the World's End bar in Edinburgh. Their unclothed bodies were found a day later.
Mr Sinclair stood trial in 2007 accused of their murders and was acquitted of the charges, which he had denied.
Earlier this year, judges granted prosecution the right to re-try him under the new double jeopardy laws passed in 2011.
A 22-year-old man has been charged with murder following the death of an elderly man in the early hours of Christmas Day.
The body of 83-year-old Bernard James Smith was discovered at the junction of Shakespeare Road and Wordsworth Avenue on the Highfields estate in Stafford at around 12.50am on Wednesday.
A post-mortem examination revealed Mr Smith died as a result of multiple chest injuries.
Labour leader Ed Miliband said the killing of a man in Woolwich is a "truly appalling murder".
Mr Miliband, cutting short a Germany visit to return to the UK, said his party offered the Government " complete support".
He said: "This is a truly appalling murder which will shock the entire country.
“All of my thoughts are with the family and friends of the victim.
“The British people will be horrified by what has happened in Woolwich. Theywill be united in believing that this terror on our streets cannot be allowedto stand.
“The Labour Party will offer the Government our complete support in establishing the facts of what happened and ensuring that those responsible face the full force of British justice."
A 13-year-old girl is among five people arrested in connection with a murder inquiry after a man's body was found in a country lane in South Yorkshire.
A 47-year-old woman and three men, aged 21, 27 and 31, have also been arrested by detectives.
Nottinghamshire Police today launched a murder investigation after the man was found in countryside near Doncaster, by the border with Yorkshire, on Saturday 2 February.
The results of a post-mortem examination have so far proven inconclusive.
A woman has been charged with the murder of a two-year-old boy.
Angela Vane, 40, from Champernowne, Modbury, Devon, will appear before Torquay Magistrates' Court tomorrow charged over the toddler's death, Devon and Cornwall Police said.
Officers were called to a home in Modbury yesterday morning after the boy's body was discovered by a member of the public.
His identity has not been released.
Police have carried out door-to-door inquiries and initial forensic work, although it is believed a post-mortem examination has yet to be carried out.
The post-mortem examination of a two-year-old boy is expected to be carried out in the coming days by a Home Office pathologist or specialist paediatric pathologist. Detectives are continuing to piece together information and urged members of the public with any information to get in touch.
Detectives have launched a murder investigation following the death of a two-year-old boy. Officers were called to a home in Modbury, Devon, yesterday morning after the little boy's body was discovered by a member of the public.
Police confirmed they have arrested a woman and she is being questioned by officers on suspicion of murder. As well as carrying out door-to-door enquiries, police have also begun initial forensic work - although it is believed a post-mortem examination has yet to be carried out.
Detectives investigating the murder of Sheffield church organist Alan Greaves on Christmas Eve have released CCTV footage of two men they want to question about the killing. The new images were released at a press conference at South Yorkshire Police's training centre in Wath-upon-Dearne.
Norwegian mass murderer Anders Behring Breivik has released a 27-page letter bemoaning his conditions in prison.
The 33-year-old, who murdered 77 people in 2011, is currently serving a 21-year sentence.
In the letter he bemoaned the "800" strip searches he has had and the fact that he does not enjoy 'enough' social interaction.
According to the New York Times, Breivik is also not satisfied with his three-suite cell - which is fitted with a television and exercise equipment.