A man in his 20s was killed, a youth was seriously wounded, and four others were moderately injured in a shooting attack on on Highway 1 between Ma'ale Adumim and Jerusalem shooting attack on Thursday morning, Magen David Adom (MDA) reported.

MDA added that two women, ages 23 and 30, were shot in the chest and are in serious condition. Another person, age 23, was shot in the abdomen and pelvis and is in serious condition. Two other victims, aged around 40, were shot in their arms and are in moderate condition.

Three people suffered shock and are being treated at the scene. One of the victims, a man in his 20s, arrived at Hadassah Mount Scopus Medical Center a short time ago, in moderate condition. Two other victims are currently on their way to the hospital. Shaare Zedek Medical Center has received five of the victims, among them a pregnant woman who is in serious condition.

"This morning on 7:29am many calls were received on MDA's 101 emergency call center about a terrorist who opened fire at vehicles on Route 1 from Jerusalem to Ma'ale Adumim, between Zaitim Junction and A-Zaim Checkpoint," MDA said.

"A large amount of MDA personnel were immediately dispatched to the site, including First Responders from MDA's Medicycle unit, ambulances, and MICUs. MDA teams arriving on scene pronounced the death of a man in his 20s and provided medical care and evacuated to Sha'are Tzedek, Hadassa Ein Karem and Har HaTzofim Hospitals 11 casualties: A 23 year-old female in serious condition, conscious, suffering from gunshot wounds in her upper body; four moderately wounded, fully conscious, including a 30-year-old female, suffering from gunshot wounds in her upper body; a 23-year-old male suffering from gunshot wounds in his stomach and limbs; a 51-year-old male suffering from gunshot wounds to his limbs; and a 52-year-old female suffering from gunshot wounds to her limbs."

"In addition, MDA teams evacuated to the hospitals a 59-year-old female who was injured, and 4 anxiety victims."

Two terrorists were eliminated at the scene.

Israel Police responded, "A short while ago, a report was received regarding a shooting attack on Route 1 from Maaleh Adumim towards Jerusalem. There are a number of victims at the scene, with varying degrees of injury."

"The two terrorists were neutralized. Police forces at the scene have initiated searches due to concerns of additional terrorists."

Two Palestinian Authority Arab suspects have been arrested near the scene of the shooting, on suspicion that they may have been involved in the terror attack. There is concern that an additional terrorist may have escaped the scene.

Eyewitnesses have said that the terrorists used automatic, not homemade, weapons.

A police update said that three terrorists arrived by vehicle, exited their vehicle and began firing automatic weapons towards vehicles waiting in a traffic jam on the Jerusalem-bound highway.

Security forces at the scene neutralized two terrorists. Searches at the scene revealed an additional terrorist attempting to escape, who was also neutralized.

Eight injured people were evacuated from the scene. The local police commander arrived at the scene of the shooting and is holding a situational assessment.

United Hatzalah volunteer EMT Avraham Becker reported: "There were injured people at several locations. I provided initial treatment to two women who suffered gunshot injuries and another woman who suffered from emotional shock. Other United Hatzalah EMTs worked at the other scenes and provided assistance to several more people who were in various conditions."

MDA senior EMT David Turgeman recounted: "The scene was complex. At that time, the road is usually busy with vehicles, and so it was today. The vehicles of the casualties were distant from each other. We performed a quick search of the scene and started to run from one car to the next to find the wounded and treated them."

MDA paramedic Nadav Tayeb, who was one of the first to arrive at the location, said: "This was a difficult scene which was laid out at a length of around 500 meters. We located 5 vehicles with wounded, in one of which a male in his 20s was sitting unconscious not breathing and with no pulse with gunshot wounds in his upper body. We performed medical checks and had to unfortunately pronounce him deceased."

"In another vehicle sat a 23 year-old female fully conscious. She was suffering from gunshot wounds to her upper body. We provided her lifesaving medical treatment and evacuated her to Shaare Zedek Hospital.

"There were four more casualties in moderate condition in the scene, a woman who was injured and a number of anxiety victims."