He might be playing a blood- sucking vampire on-screen, but 'Twilight' star Robert Pattinson is scared that he might get killed by his crazy fans in real life.

In a new book named 'Robert Pattinson: The Unauthorised Biography', the 23-year-old actor has expressed his fear of obsessed followers who are after his life ever since he shot to fame with the vampire movie, reported News of the World.

"People ask me to bite them and want to touch my hair.I just don't want someone to have a needle and give me HIV and I don't want to get shot or stabbed," Pattinson says.

The 'Twilight' sequel 'New Moon', in which he again plays vampire Edward Cullen, opens in London on Wednesday and has a high-profile movie premiere in Los Angeles the day before. But Pattinson is terrified of such occasions.

"Oh my God. Are they going to blow the place up?" he says.

The British actor also narrates an incident when crazy fans cut themselves to bleed to show their love for him.

"There were girls who had scratched the side of their necks, so they were freshly bleeding when they came up to get a signature. They were like, 'We did this for you'. I didn't know what to say. 'Thank you, guys?'," Pattinson says.