(Reuters) -Iran could be producing enriched uranium in a few months, the head of the U.N. nuclear watchdog Rafael Grossi was quoted as saying on Sunday, raising doubts about how effective U.S. strikes to destroy Tehran's nuclear programme have been.

It is clear that there has been severe damage, but it’s not total damage,” head of U.N. nuclear watchdog tells CBS.

The comments, from a CBS News interview airing Sunday, raised doubts about how effective U.S. strikes to destroy Tehran’s nuclear program have been