Labour MP Naz Shah today apologised and quit as an aide to John McDonnell over the row

A Labour MP today has resigned as an aide to John McDonnell after sharing a graphic on social media that appeared to say Israel should be 'relocated' to America.

Bradford West MP Naz Shah shared an image that showed an outline of Israel superimposed on to a map of the USA.

The headline on the image said: 'Solution for Israel-Palestine Conflict - Relocate Israel into United States.'

Ms Shah then wrote with the post: 'problem solved.'

The Muslim MP today apologised for 'offence caused' before quitting as the shadow chancellor's PPS.

The resignation will reignite a bitter row within Labour about whether Jeremy Corbyn has done enough to combat anti-Semitism among some new members who have joined the party under his leadership.

Tory MPs today led calls for Ms Shah to be suspended from the Labour Party over the incident.

Questions have also been raised about Ms Shah's membership of the Home Affairs Select Committee, which is research anti-Semitism currently. Her post will not be discussed by the committee before its next meeting on Tuesday.

The Facebook post, shared by Ms Shah in 2014 before she became an MP, suggested the US has 'plenty of land' to accommodate Israel as a 51st state, allowing Palestinians to 'get their life and their land back'.

It added that Israeli people would be welcome and safe in the US while the 'transportation cost' would be less than three years' worth of Washington's support for Israeli defence spending.

Ms Shah added a note suggesting the plan might 'save them some pocket money'.

After the posting was highlighted by the Guido Fawkes website, Ms Shah released a statement in which she said: 'This post from two years ago was made before I was an MP, does not reflect my views and I apologise for any offence it has caused.'

In a second statement, she added later: 'I deeply regret the hurt I have caused by comments made on social media before I was elected as an MP.

'I made these posts at the height of the Gaza conflict in 2014, when emotions were running high around the Middle East conflict. But that is no excuse for the offence I have given, for which I unreservedly apologise.

'In recognition of that offence, I have stepped down from my role as PPS to the shadow chancellor John McDonnell.

'I will be seeking to expand my existing engagement and dialogue with Jewish community organisations and will be stepping up my efforts to combat all forms of racism, including anti-Semitism.'

Oliver Dowden, the Conservative MP for Hertsmere, today wrote to the Labour leader demanding he expel Ms Shah from Labour.

He said: 'A failure to act would call into question the commitment of the Labour Party to deal with wholly unacceptable behaviour and would constitute a betrayal of the values that all those who believe in democracy should uphold.'

Ms Shah is a member of the House of Commons Home Affairs Committee, which is conducting an inquiry into the rise of anti-Semitism

Ms Shah shared the graphic, pictured left, in August 2014 on Facebook. She added comments underneath, pictured right, suggesting she would lobby Barack Obama and David Cameron over the idea

Tory MP Andrew Bridgen told the website: 'If Jeremy Corbyn was serious about tackling anti-Semitism, he would put his money where his mouth is and remove the whip her from Naz Shah immediately.'

Mike Freer, Conservative MP for Finchley and Golders Green, told MailOnline: 'She is another example of the poison that is coursing through the Labour Party. She should have the whip withdrawn and she should recuse herself from the Home Affairs inquiry into Ant-Semitism.'

Ms Shah is a member of the House of Commons Home Affairs Committee, which is conducting an inquiry into the rise of anti-Semitism.

Jonathan Sacerdoti, director of communications at the Campaign Against Antisemitism, said it would be 'hard' for his organisation to take the parliamentary committee's inquiry seriously if Ms Shah remained part of it.

Speaking before Ms Shah's resignation, he said: 'One cannot simply apologise for ''any offence caused'' and expect a evidence of gross and brazen anti-Semitism to disappear.

'Once again the Labour Party has been revealed to have within its ranks people who express extreme prejudice towards Jewish people in their public statements. Once again the party has failed to find these statements itself, and reject those who freely and willingly express them.

'How can we believe Labour when it says it takes the problem of Jew-hatred seriously when it repeatedly defends anti-Semitic MPs? It seems that Jeremy Corbyn's anti-racism policy only operates when convenient.'

He added: 'We have offered to assist the Select Committee in its work investigating anti-Semitism. However, if Naz Shah remains on the committee it will be hard for those of us giving evidence to take the inquiry seriously.'

Last night the Jewish Chronicle reported that in August 2014 she linked on Twitter to a blog where Zionism – the belief in a Jewish state – was likened to Al Qaeda.

The blog also claimed Zionism had been used to ‘groom’ Jews to ‘exert political influence at the highest levels of public office’.

In July 2014 she posted a link on Facebook to an online poll asking whether Israel had committed war crimes. She wrote: ‘The Jews are rallying to the poll.’

In another – eight months before she became an MP – she wrote ‘Apartheid Israel’ over a picture of Martin Luther King with the caption ‘Never Forget That Everything Hitler Did In Germany Was Legal’. This prompted Sir Eric to demand she be stripped of the Labour whip. Mrs Shah is also under pressure to stand down as a member of the House of Commons home affairs committee while it conducts an investigation.