Israeli special forces [Yamam] conducted a raid Sunday morning in Jerusalem, at the home of an individual suspected to have shot at security officers at the Shuafat border crossing Saturday night, according to KAN.
KAN also reported that the suspect's brother turned himself into Israeli security forces on Sunday morning.
As well as the suspect's brother, three other men were arrested on suspicion of involvement in the attack, and all four men's arrests were extended by eight days on Sunday afternoon.
The shooter opened fire in the direction of a security checkpoint at the entrance to the east Jerusalem neighborhood of Shuafat on Saturday evening, killing 18-year-old female Military Police officer Noa Lazar, and severely wounding a 30-year-old security guard. A third individual was also reported lightly injured.
Palestinian sources published a video of Israeli forces entering the home in Shuafat.
KAN added that Israeli security forces know the identity of the suspect, and he has no known criminal background and is not affiliated with any known terror organizations.
Events of the Saturday night attack
The shooter arrived at the scene in a vehicle belonging to a stranger. When the car stopped at the checkpoint, he fired seven rounds until his gun jammed.
The terrorist had pretended to be hitchhiking to Modi'in in order to secure a ride. The driver turned himself in after the fact and was determined not to have been intentionally involved in the attack.
IDF Chief of Staff Aviv Kohavi visited the scene of the attack on Sunday afternoon.
"We are meeting under painful circumstances, but this is my chance to thank you, the commanders and the soldiers, thank you for the work you do all year," he said to Lazar's fellow soldiers. "At this moment, I want to send my condolences to the family. I strengthen and embrace you. You - the soldiers are our first line of defense. Thanks to you, terror attacks are prevented on a daily basis.
"Be proud in what you do. With all the difficulty, I wish you all a happy holiday and continue to defend and take care of the citizens of Israel through your work."