WASHINGTON -- Three-month-old Chaya Zissel Braun, the baby girl killed today in Jerusalem during a vehicular terrorist attack, was an American citizen, a US official confirmed to The Jerusalem Post on Wednesday night.The girl was thrown from her stroller as a car swerved into a city light rail stop, injuring seven others.State Department deputy spokeswoman Marie Harf has "urged restraint" and calm from all sides in after the attack."The United States condemns in the strongest possible terms today’s terrorist attack in Jerusalem," State Department spokeswoman Jen Psaki said in an evening statement. "We express our deepest condolences to the family of the baby, reportedly an American citizen, who was killed in this despicable attack, and extend our prayers for a full recovery to those injured. We urge all sides to maintain calm and avoid escalating tensions in the wake of this incident."The suspected perpetrator has alleged ties to Hamas, Israeli officials say."This is a natural response to the crimes of the occupation and invasion of our land by the Jews," Hamas spokesman Hossam Badran said in response to the attack.