A new study claims a link between brain tumours and mobile phone use.
The investigation by the Swedish National Institute for Working Life states that people who use their mobile for an hour a day over many years have a 240 per cent greater risk of developing a tumour than a non user.
The study, reported in the International Archives of Occupational and Environmental Health, found that 85 of the 905 people with a malignant tumour involved in the project had used their phones for over 2,000 hours.
Kjell Mild, lead author of the report, told the Reuters news agency that if people must use the devices they could lower the potential damage from the phone's radiation by using hands free kits.
The findings, which contradict a UK report published in January claiming that people are safe from any harmful effects of mobile phones, have been met with scepticism from some quarters, with calls for a further study in to mobile phone use and its damage to the brain.