Khan said in an interview to a local television channel before he left for Bangladesh this week that the International Cricket Council had also written to its member boards on the issue.
According to Khan, the ICC had asked its member boards to investigate and find out if anyone in their country had been approached for such a rival global cricket set up and T20 league.
"It is something which can damage cricket if it happens so we are worried like everyone else," Khan said.
Recent reports said that the England and Wales cricket board has sought clarification about the role of Ten Sports channel in the planned rival league since it was owned by the same group which was planning the rival cricket set up.
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"Yes the England series is a worry for us because Ten Sports which has recently acquired our media rights for the next five years needs to clarify its position. Pakistan is clear it will always stand by the ICC and its decisions," Khan added.
Khan said in the past attempts had been made to have rival cricket set ups and tournaments so it was not easy to disregard such reports.
"We have seen it happen before and if does happen again it will damage cricket and also the big three governance system," he stated.
The Indian Essel Group, which held the Indian Cricket League (ICL) from 2007 to 2009 and the league was outlawed by the international board and member boards including the BCCI.