In Afghanistan, at least seven members of the Afghan security forces have been killed in a NATO air strike in western Badghi province. The Afghan Defence Ministry says, NATO and the Afghan authorities are investigating the incident which took place yesterday. Reports say four Afghan soldiers and three policemen were killed. There has, however, been no word from NATO forces so far on whether an air strike has taken place. Earlier, NATO said more than 25 NATO and Afghan troops were wounded during a search on Friday for two US paratroopers missing in north-west Afghanistan.