What mistake by caterers caused trouble at the Under 19 cricket world cup in New Zealand?

Serving toasted ham sandwiches up to the Afghani’s doesn’t sound particularly sensitive. Surely you K1′s should have been able to drum up some Halal Lamb.

http://www.nzherald.co.nz/cricket/news/article.cfm?c_id=29&objectid=10622372