A British man is being questioned by police in France on suspicion of murdering his two children.

The man has been named by the UK Foreign Office as Julian Stevenson. He was held after the bodies of his son and daughter were found by police in his flat in Saint-Priest, a suburb of Lyon. Their throats had been slit.

The children have been named in local reports as Mathew, 10, and Carla, 5.

Stevenson who was said to be unemployed had been living in France for some time - possibly around 10 years. The 47-year-old and his French ex-wife, an assistant accountant, were said to have recently gone through a bitter divorce.

The children lived with her in the Isere region after she won custody. They are believed to have been staying with their father for the first time at the weekend, who had visitation rights, but only in the presence of another person.

Clothes reportedly stained with blood

The children's mother is said to have been worried about the visit and had come to find them when she saw her ex-husband in the stairwell of the four-storey block of flats. His clothes were reportedly stained with blood and she raised the alarm.

Reports suggested she had gone to his home after he failed to return the children following the visit. Neighbours said they saw the man flee the scene on roller skates.

He is said to have admitted the killings "but did not go into details of the motive", prosecutors told the AFP news agency.

Neighbours said the couple had separated several years ago.

A UK Foreign Office spokesman said "We are in touch with the French authorities and await the outcome of their investigation. We stand ready to provide consular assistance."