A young British woman has died after undergoing a suspected back-street cosmetic treatment in Philadelphia.

Claudia Aderotimi, 20, from London, began to suffer chest pains and had trouble breathing after being administered an injection to enhance her buttocks in a hotel room on Monday. She was taken to a nearby hospital where she died soon after.

She had travelled to the United States with three friends. Detectives are searching for those who carried out the procedure, which they believe was arranged over the internet.