Western forces running the Afghan airlift braced on Saturday for more attacks after the United States launched a drone strike, apparently killing an Islamic State "planner", two days after the group claimed a deadly bombing outside Kabul airport.

Among the 92 killed in Thursday's suicide blast, claimed by Afghanistan's Islamic State affiliate, were 13 US service members, the most lethal incident for US troops in Afghanistan in a decade.

"Initial indications are that...