LONDON - A graphic public service announcement from British police about the dangers of sending text messages while driving has become a global Internet hit.

Gwent Police in Wales say an extract from their video has been viewed more than 6 million times on YouTube and other sites.

The 30-minute film shows a teenager named Cassie who triggers a pileup that kills four people when she tries to send a text message while driving. The film shows heads going through windshields, bloodied bodies and the lifeless eyes of a baby.

It's illegal in Britain to talk on a hand-held mobile phone or text while driving.

The film has been discussed on TV shows in the United States, where over a dozen states have banned texting while driving and others are considering it.