MARJAH, Afghanistan (AP) -- U.S. Marines and Afghan troops are coming under fire from sniper teams across the Taliban haven of Marjah in Afghanistan.
Several gun battles have erupted on the third day of a major offensive to seize the extremists' southern heartland.
The Marines say that multiple firefights in different locations are taxing the ability of coalition forces to provide enough air support as NATO forces forge deeper into the town.
The massive offensive involving some 15,000 U.S., Afghan and British troops is the biggest joint operation since the 2001 U.S.-led invasion of Afghanistan.
However, the mission faced a setback on Sunday when two U.S. rockets slammed into a home outside Marjah, killing 12 civilians.
NATO says the rockets missed their target by about a third of a mile.
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