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 late on Friday morning on suspicion of conspiracy to commit burglary.
Friday'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.
Police said in December they were called to the scene by security at the building, which is next to Hyde Park.
The offenders are thought to have entered through a garden before breaking into safes hidden in a bedroom.
Officers used sniffer dogs to search the grounds and also went through CCTV footage.
At the time of the burglary, it was reported that intruders fled with items including rings, earrings and an £80,000 Cartier bangle given as a wedding present.
The raid occurred just after Ms Ecclestone left the country for her Christmas holiday with her husband Jay Rutland and their daughter Sophia.
