Senate Minority Leader Chuck Schumer stated that "This sickening shooting seems to be another horrific instance of antisemitism which as we know is all too rampant in our society."
The victims were identified as Yaron Lischinsky and Sarah Lynn Milgrim.
The IDF fired warning shots near a delegation of 25 people, after they entered an unapproved area in order 'to distance them.'
The 26-year-old was initially in critical condition, according to media sources, and was later pronounced dead.
Police mobilized after hearing gunshots from the party and arrested two suspects involved in the use and possession of weapons.
Authorities now believe that a single terrorist conducted the attack in a sniper ambush from the side of the road.
A suspected shooting in the area of Reihan Crossing and a suspected car-ramming attack in the Hebron Hills injured a combined three IDF soldiers minutes apart on Wednesday.
In March, counter-terrorism forces killed four ISIS affiliates who authorities said were plotting to attack a branch of the interior ministry.
Sweden has suffered from a wave of gang-related violence for more than a decade that has included an epidemic of gun violence.
No one was injured in the shooting. The verdict did not mention any motive for the attack.