Thieves have acquired new weapons to exploit Bluetooth-enabled phones and computers to steal valuable data, experts warn.

Though Bluetooth integrates certain security measures, security expert Adam Laurie has shown reporters at the BBC how he can 'bluesnarf' into other Bluetooth-enabled devices without permission using some software and a Bluetooth-capable computer.

A BBC report last week showed that this potentially means thieves can get hold of phone book, contact, calendar and other multimedia information from phones. They can get hold of even more information from Bluetooth-enabled laptops.

One example fear is that unscrupulous sales organizations can use these features to seize information from competing firms, for example.

Mobile phone vendors Nokia and Sony Ericsson are looking into the problem.