Essex police apologises after hackers hijack its Twitter account

Rogue tweet directed followers to 'offensive' picture but site did not seem to be running malware, force says

Essex police have launched a review of their online security after hackers hijacked their Twitter account and potentially directed thousands of the force's online followers to an "offensive" picture.

The force apologised to its 108,924 Twitter followers after the rogue tweet was sent out by a hacker on Friday morning.