Published: Jul 13, 2010 11:31 AM EDT
Updated: Jul 13, 2010 8:32 AM EDT

KABUL, Afghanistan (AP) - An army spokesman says an Afghan

soldier working with international forces has killed three British

troops with a rocket-propelled grenade.

Afghan Defense Ministry spokesman Gen. Mohammad Zaher Azimi said

Tuesday's early morning attack also wounded four other British

troops.

He said the Afghan soldier escaped and is being sought.

President Hamid Karzai has expressed condolences and apologies

for the attack. NATO commander Gen. David Petraeus has reiterated

that Afghan and international forces must work together to fight

the common enemy of Taliban insurgents.