Web filtering and security firm Websense has warned internet users to be aware of online tricksters seeking to exploit this year's Halloween celebrations.

Websense claims to have identified some scary websites set up to dampen the Halloween cheer.

Users may encounter one of these malicious sites when searching Google for Halloween items.

Websense has described one instance of these scams as the classic " typo-attack" in which cyber-criminals create links to web pages that host malware.

The sites take advantage of commonly mistyped word searches such as 'halkoween' instead of 'halloween'.

These websites often advertise Halloween-related details in their titles, but actually contain dangerous spyware which could log user activity on the web.