Toby Lanzer, the acting head of the United Nations mission to Afghanistan, said the bombing was "another truly despicable crime in a year already marked by unspeakable atrocities."
Islamic State kills 41 in attack on Afghan cultural center →
Officials said this month that up to 2 million affected people in the region have not been contacted, "and we can't assess their situation," said U.N. Assistant Secretary-General Toby Lanzer. "We can estimate that it's awful."
Nigerians displaced by Boko Haram now threatened by famine →