A Palestinian attacked six Israelis with acid on Friday near a tunnel checkpoint in the West Bank.
The suspect was shot in the leg prior to his arrest; he remains in serious condition.
Magen David Adom workers treated the injured on site before evacuating them to Hadassah University Medical Center in Jerusalem. The four girls, between the ages of eight-ten, and two adults suffered light wounds and remain in fair condition.
The suspected perpetrator received initial medical treatment at the scene, MDA reported.
According to the IDF, the attack occurred after the family traveling near the security checkpoint picked up a hitch-hiker, who proceeded to throw acid on the passengers in the vehicle.
The assailant then attempted to attack the father of the family with a screwdriver, but he managed to escape.
As security forces were in pursuit of the suspect, a separate civilian in a vehicle near the scene shot and wounded the suspected attacker in the leg.
Border Police officers then arrested him. Palestinian sources said the suspect was a resident of Kfar Nahalin outside Bethlehem.
Earlier on Friday, a Palestinian driver crashed into a security barrier nearby where two IDF soldier were standing outside a military outpost in the West Bank near Nablus on Friday. No soldiers were injured. The driver, however, was lightly hurt.
It was at first unclear if the incident was an attempted terror attack, but later in the day the IDF spokesperson said a preliminary investigation suggested that it was a car accident.
Following a spate of terrorist attacks in which Arabs in vehicles have slammed into Israelis, the IDF planned to deploy protective barricades at 20 hitchhiking posts and bus stops in the West Bank.
Meanwhile, Jerusalem police said Friday they had increased their deployment in the city due to the concern of riots following the death of a Palestinian Authority minister.
Police said no limits had been placed on Muslim prayer at the Temple Mount on Friday.