The Equality and Human Rights Commission has launched a formal investigation into the Labour Party over allegations of anti-Semitism.
The watchdog told the party in March it had received a number of complaints and was considering its next steps.
It will now formally look into whether Labour has "unlawfully discriminated against, harassed or victimised people because they are Jewish".
Labour has said it will "co-operate fully", the EHCR added.
https://www.bbc.co.uk/news/uk-48433964