 Complete the following phrase:  In 2017 PCB Chairman had announced that West Indies would tour Pakistan for 3 match T20I series which were scheduled to be played in Lahore, the fixtures were to be played in November 2017. However, early in November 2017, reports announced that the West Indies team would not be travelling to Pakistan over security concerns. The Pakistan Cricket Board PCB chairman Najam Sethi stated that the original schedule was changed due to unforeseen weather, logistic issues and challenges with security. In March 2018, the PCB confirmed that the fixtures would take place in April at the National Stadium in Karachi after the conclusion of PSL 2018. The last time an international cricket match was played at the venue in Karachi was in February 2009, when Sri Lanka toured Pakistan. That series was cut short, following an 