LONDON, July 10, 2008 (AFP) - Police in London issued an urgent appeal Thursday for a 'dangerous man' they want to speak to following the murder of two French students in London.

Members of the public are being advised not to approach Daniel Sonnex, 23, but to call police immediately if they see him.

The appeal came after Nigel Farmer, 33, appeared in court in London on Thursday charged with the June 29 murders of Gabriel Ferez and Laurent Bonomo, both 23, who were found in a burnt out flat and had been stabbed to death.

The students were on an exchange programme at London's prestigious Imperial College.