Another arrest in French students' murder

LONDON, England (CNN) -- Police have arrested another person in connection with the stabbing deaths of two French students in London, police said Thursday.

The arrest was made hours after Nigel Farmer, 33, appeared in court charged with arson and murdering Laurent Bonomo and Gabriel Ferez.

Farmer, arrested when he walked into a police station on Monday, is also charged with "attempting to pervert the course of justice." He was remanded in custody.

Daniel Sonnex, 23, was arrested at a south London address Thursday evening, London's Metropolitan Police said.

In addition, a 35-year-old man and a 25-year-old woman were arrested Wednesday in connection with the investigation, police said.

They remained in custody Thursday at a south London police station, according to Metropolitan Police. Neither was identified.

A 21-year-old man was arrested Saturday and later released, Metropolitan Police said. No further action will be taken against him.

The bodies of Bonomo and Ferez, both 23, were found in Bonomo's burned-out apartment in southeast London on June 29, the victims of what the lead detective in the case, Mick Duthie, last week called a "frenzied, brutal, horrific attack."

Investigators initially believed the French men died in the fire, but an autopsy showed each had been stabbed dozens of times in the head, neck and torso -- 196 times, in Bonomo's case, and 47 times for Ferez.

Both were students at Universite Blaise-Pascale in Clermont Ferrand, France. They had arrived in London in late May to do research at Imperial College in London and were planning to return to France at the end of July. Police said the killer also set fire to the room, using an accelerant to cause an explosion.

Investigators said the last known contact with the two men was about 1 a.m. Sunday, when Bonomo spoke to his fiancee. They said his apartment had been broken into six days before the fire, and investigators were trying to find out whether the two incidents were related.

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