The Animal Liberation Front (ALF) is being credited with an attack on the home of an employee of the Sumitomo Corporation for it's ties to vivisection giant Huntingdon Life Sciences (HLS). Sumitomo is a Japanese based pharmaceutical company, although they deny any connection to HLS, which was listed on a 2000-2003 list of HLS customers. The document was leaked to activists in March of 2003. The ALF is also claiming responsibility for a raid on a Long Island laboratory earlier in the week in which blueprints were recovered.