Jeremy Corbyn is facing fresh criticism over his failure to tackle anti-Semitism in the Labour Party, following a report that it has a backlog of 74 cases that are still to be dealt with.
The Daily Mail quoted a Labour source which claimed some cases date as far back as two-years ago and include some of the "most shocking and blatant" examples of anti-Jewish sentiment which "would make even a committed Nazi blush."
However, the party has insisted that the number of "live" cases represented no more than 0.01% of the Labour membership.
A spokesman added that any anti-Semitism complaints were dealt with "extremely seriously" and were fully investigated.
The Labour Party spokesman said: "The Labour Party is committed to challenging and campaigning against anti-Semitism in all its forms.
"Any complaints of anti-Semitism are taken extremely seriously. These are fully investigated in line with our rules and procedures and any appropriate disciplinary action taken."
The claim is likely to increase the pressure on Corbyn, who acknowledged on Monday (March 26) that Labour has been "too slow" in dealing with cases of anti-Semitism and apologised for the "hurt" it had caused.
His admission followed an unprecedented letter from the Board of Deputies of British Jews and the Jewish Leadership Council accusing him of siding with anti-Semites "again and again."
Labour MPs Wes Streeting, co-chairman of the All Party Parliamentary Group on British Jews, and John Mann, chairman of the All Party Parliamentary Group against anti-Semitism, have written a letter to the Labour leader asking him to tackle "this poison in our ranks."
Streeting tweeted a copy of the letter and said Corbyn's comments earlier in the week have "not been heeded by all those claiming to support him."
The letter says there must be a "turning point for our Party on anti-Semitism" and Corbyn needs to "send a message of solidarity" to all Jewish members.
Shadow business secretary Rebecca Long-Bailey has also said the party will be rolling out a "political education programme" to ensure party members are fully aware of the issue.