The ICC has confirmed that next month’s matches between Kenya and Namibia in Nairobi have been postponed until September 2012 due to security concerns.Nairobi Gymkhana was to host the four-day ICC Intercontinental Cup match between the two sides from June 6, followed by two 50-over ICC World Cricket League Championship matches on June 11 and 13.The ICC considered holding the match at an alternate venue but decided against it due to logistical difficulties. The final dates and venue are yet to be announced.There have been no international matches in Kenya since Ireland’s tour in February.