(CNN) -- Three children helping their mother operate a fruit stand were killed Friday when a stolen SUV plowed into a small crowd on a street corner.
Two brothers, 7 and 10, and their sister, 15, died in the wreck in north Philadelphia, police told CNN affiliate KYW.
"I saw these kids on the ground, the woman on the ground crying, their clothes ripped off them," said Jesse Bridges of Eagle's Wings Evangelical Church.
Philadelphia police said two men carjacked a real estate agent who was showing a house and pushed her into the back seat of her Toyota SUV. The men drove around Philadelphia at a high rate of speed while holding the woman at gunpoint, police said.
At some point the SUV had a flat tire, but the men kept driving, police said.
The vehicle rounded a corner at Germantown and Allegheny avenues and ran into a small crowd on the corner, including the fruit stand where the family was raising money for their church, police said.
The children's mother, 34, was in critical condition at Temple University Hospital, police said. Another woman helping at the fruit stand and the SUV owner also were hospitalized, police said.
The SUV wrecked in a wooded area and the two men ran away, police said.
A reward of $110,000 is offered for information leading to their arrest.
The father of the 7-year-old boy urged the suspects to surrender to authorities.
"Taking innocent peoples' lives, that was my son," he told KYW. "You took him away from me. Turn yourself in."
"They were sweet," Ursula Jackson of North Philadelphia said of the three children. "They were beautiful, they were beautiful little kids."
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