US raid 'killed Afghan civilians'
Karzai said that attacks by foreign forces had only succeeded in killing civilians [EPA]
At least 20 civilians have been killed in an air attack by US-led troops in Afghanistan's Laghman province, according to Afghan officials.
The official disputed a statement by US military forces on Thursday that said more than 30 fighters were killed in the attack, which took place a day earlier.
A US-military spokesman said he had no knowledge of the non-combatant deaths.