Foreign Office minister Baroness Symons has promised to meet with Erica Duggan, whose son Jeremiah died in suspicious circumstances in Germany last year.

Jeremiah, 22, was a Jewish student at the Sorbonne in Paris but died after attending a conference in Wiesbaden, Germany, run by the LaRouche Youth Movement, which is believed to have anti-Semitic leanings.

He called his mother on the night he died to warn her that he was in trouble. Forty-five minutes later, he was run over by three cars on a motorway.

Mrs Duggan, of Dunstan Road, Golders Green, attended a meeting with Foreign Office staff last week but was told that officials were powerless to oblige the German authorities to reopen investigations into his death.

She said: "I am not saying the meeting was not successful, though. I felt initially disappointed, but they did say they will reflect on it. They have sent a copy of the inquest report to the German authorities.

"They did go some way in giving an ear to my concerns and I am hoping they will go even further. The positive thing is they have offered me another meeting with Baroness Symons in the next few weeks."

Hornsey coroner William Dolman found there was no evidence of suicide last year, and Mrs Duggan wants the German authorities to reinvestigate what happened and examine the running of the LaRouche movement.

Mrs Duggan said: "I have done a lot of research into LaRouche and have found that they put forward anti-Semitism.

"As the coroner says, they are 'secret and sinister'. I have had calls from people all around the world about the organisation and am concerned about emotional indoctrination and that's the worst part for me: Jeremiah went there with the best intentions."

A spokeswoman for the Foreign Office said it was up to the public prosecutor in Germany to reopen investigations.

She said: "The public prosecutor is due to report soon and then it is up to them. We have sent them a note of the family's concerns and are doing everything we can in a consular capacity but have no legal jurisdiction to ask them to reopen the investigation."

But Rudi Vis, MP for Finchley and Golders Green, was not convinced, and said he would take the case to the European Court of Human Rights if the family did not get answers soon.

He said: "There have been investigations into things like this in the past. This is a delay which is unwarranted and unnecessary. The Government should be proactive."

If you would like to support the family in their investigations, send a donation to the Jeremiah Duggan Memorial Fund, BCM JERRY, London WC1N 3XX.