Two more people have been arrested over a £50 million jewellery raid on heiress Tamara Ecclestone's London home.
A 47-year-old woman and a 21-year-old man were arrested at Stansted Airport on suspicion of conspiracy to commit burglary.
Yesterday's arrests come after a 29-year-old man was detained at Heathrow Airport on Thursday afternoon on suspicion of conspiracy to commit burglary and money laundering.
A 31-year-old man was arrested at an address in East London on Thursday night, also on suspicion of conspiracy to commit burglary and money laundering.
The Metropolitan Police said all four suspects remain in custody.
It said the arrests were in relation to the burglary in Palace Green, Kensington, on December 13 in which all of Ms Ecclestone's jewellery was reportedly taken.
She was left "angry and shaken" by the incident, according to her father, former Formula One boss Bernie Ecclestone. The offenders are thought to have entered through a garden before breaking into safes in a bedroom.