A man has been arrested after farm manure was thrown over Robert Kilroy-Silk in Manchester.
Mr Kilroy-Silk had manure thrown over him before a BBC radio show
The former MP and current MEP was attacked outside Manchester High School for Girls last month as he prepared for a BBC Radio 4 show.
Greater Manchester Police arrested a 37-year-old man, from Wilmslow, Cheshire, on Thursday.
He is suspected of racially aggravated criminal damage, public order offences and assault.
'Head to toe'
Mr Kilroy-Silk, who recently quit the UK Independence Party, was about to take part in the BBC's Any Questions? programme when the incident happened.
Fellow guest Ruth Kelly, now the Secretary of State for Education, was also hit, but both of them carried on with the show.
Mr Kilroy-Silk later claimed his attacker had told him he was "doing it in the name of Islam".
The programme's presenter, Jonathan Dimbleby, told the audience the MEP had been covered from "head to toe".
Mr Kilroy-Silk quit his BBC One show for remarks he made about Arabs prompting outrage from Muslim groups.