The Taliban said it was revenge for the Koran burning.
“The foreign forces have insulted our religion and this attack was revenge,” Taliban spokesman Zabihullah Mujahid told AFP.
The rebels also claimed that an “Afghan cook” working on their behalf poisoned the food of Nato troops at another base in the same province of Nangarhar.
Nato’s International Security Assistance Force (ISAF) launched an investigation after “traces of bleach” were found in fruit and coffee, a spokesman said.
“There were no injuries, no fatality. The investigation is ongoing.” said Master Sergeant Nicholas Conner.He said he respected the emotions of Afghans upset by the Koran burning in an incinerator pit at Bagram airbase, north of Kabul, but urged them not to let “the enemies of Afghanistan misuse their feelings”.