Detectives have released CCTV footage of several men they want to speak to after a man was 'sprayed with a substance' during an 'unprovoked' attack. The victim, a man in his 40s, was walking home when he was assaulted by a group of four men in Wigan Road in Ashton-in-Makerfield, Wigan, at about 12.45pm last Monday (June 13).