Insight - Intelligence gaps may have helped Afghan Taliban breach NATO fortress

General view shows the house belonging to suspected suicide bomber Qari Naib in Bagram, Afghanistan Novmber 18, 2016. REUTERS/Omar Sobhani

BAGRAM, Afghanistan (Reuters) - In the year before Qari Naib blew himself up on Nov. 12 inside a NATO base near Kabul killing four Americans, Afghan intelligence warned the U.S. military at least twice that a worker could be planning an attack, government and security officials said.

The Afghan officials also said they repeatedly asked Western forces to share information about local employees at the vast Bagram air base in order to check for "suspicious people among them", but were refused.