Lee Rigby killer Michael Adebowale studied in west Wales
One of two men who murdered Fusilier Lee Rigby in London last year studied at an Islamic college in west Wales.
A parliamentary report into Michael Adebowale and Michael Adebolajo revealed Adebowale studied Arabic at the European Institute of Human Sciences in Llanybydder in 2012.
MI5 had contacted police from the Welsh Extremist and Counter Terrorism Unit in 2012 to investigate Adebowale.
They found he did not cause trouble while a student at the college.
Adebowale was believed to have converted to Islam in order to move away from the crime gangs and drugs scene in London.
The report came after the Intelligence and Security Committee spent 18 months examining the actions of MI5, MI6 and the government communications centre GCHQ in relation to the two men.
The section relating to Adebowale's stay in Wales reported the college was established in 1998 by a group of Iraqi Islamic clerics.
It lost its academic accreditation in 2005 apparently over concerns about the level of academic rigour.
Police told the committee the college had followed a "moderate ethos" and aimed to integrate students with the local community.
It currently did not offer courses and largely stood empty, the report added.
Local people told BBC Wales the college had been shut for a while, possibly up to a year.
The committee considered whether Adebolawe's choice of college might have been significant but MI5 told them the college "was not an extremist place".
The report also stated that an officer from WECTU was believed to have actually spoken to Adebowale personally during the course of the counter-terrorism investigation into him in 2012.
WECTU'S assessment was that he appeared to moving away from extremist activity.
Adebowale and Adebolajo killed 25-year-old Fusilier Rigby near Woolwich Barracks in south-east London on 22 May 2013.
They drove a car into him before hacking him to death.
Adebolajo, 29 at the time of sentencing, was given a whole-life term in in February and Adebowale, 22, was jailed for a minimum of 45 years.
A spokesperson for the Metropolitan Police said: "We would not want to go into detail beyond what has been published in the report."