Atlanta: Critics in the United States have pounced on the decision of a grand jury in Georgia's Habersham County not to indict any of the officers involved in a botched drug raid that left a toddler disfigured.

"How can it not be a crime for a policeman to throw a bomb into a room that injures a baby? That's not answered," said Donald Wilkes jnr, a professor of law emeritus at the University of Georgia who reviewed the grand jury's 15-page ruling issued on Monday. "This is a shocking miscarriage of justice."

SURGERY ONGOING: Bounkham "Bou Bou" Phonesavanh was injured after police used a no-knock warrant in a raid on his home.

Nineteen-month-old Bounkham "Bou Bou" Phonesavanh's nose was detached from his face after a stun grenade, lobbed by a member of the Habersham SWAT team serving a no-knock warrant on a suspected drug dealer, landed in the playpen where he was sleeping.

Family spokesman Marcus Coleman says the toddler's medical bills – which Habersham County won't pay – have topped $US1 million ($1.15 million) and he still faces numerous surgeries.