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The family of Siu Fung Sze, 9, said Friday that they are still on shock over the stabbing that sent him to the emergency room Wednesday.

Police released a surveillance video of the two teenagers believed to be responsible for the attack.

The first suspect is between 14 and 18 years old, around 5'11" tall and weighs 180 pounds.

He was last seen wearing a white hooded jacket, dark pants, and dark shoes.

The second suspect is also between 14 and 18 years old, 5'2" inches tall and weighs 150 pounds.

He was last seen wearing a white t-shirt, black shorts, black shoes with white socks and a backpack.

The attack happened just a few blocks from their home in Sheepshead Bay. Siu Fung was picked up at summer camp by his grandmother at about 6:00 p.m. Wednesday.

Yue Lan Zhou, the grandmother, spoke to NY1 through a translator about what happened on their walk home.

"Normally they would go a different way and the child would go faster than her, but this time she was holding his hand and the two guys were actually waiting for them," said the translator.

Family members said the attack happened underneath scaffolding at a construction site. Two teenage boys charged at the boy.

"The two attackers were standing here, they were leaning against the poles," said the translator. "Basically, they came out of nowhere and stabbed her grandson."

The grandmother attempted to fight them off with her umbrella.

"She was screaming. She wanted to chase the two boys down, but they ran away so she stopped and went back to her grandson. She chased two steps then turned around because he was obviously injured," said the translator.

Anyone with information on the case should contact the Crime Stoppers hotline at 1-800-577-TIPS, or text CRIMES and then enter TIP577, or visit www.nypdcrimestoppers.com.