Urgent checks are to be carried out on genetically modified seeds after a trial in the UK was contaminated by rogue seeds.Government minister Elliott Morley has told the BBC an urgent investigation will be carried out into how seeds from a GM crop experiment became mixed with a strain unauthorised for planting.But he rejected calls from environmental groups for an immediate end to the field testing of GM crops in Britain.The experiment involved trials of GM rapeseed crops at 12 sites in England and two in Scotland.</p><p><a href="http://news.bbc.co.uk/1/hi/uk/2195762.stm">BBC NEWS UK Urgent tests on GM crop seeds</a></p><p><a href="http://news.independent.co.uk/uk/environment/story.jsp?story=324776">The Independent: Ministers suspend GM crop-testing</a>