The man was lightly injured and the two laborers fled the scene. The police are searching for them in the area. It is still unclear what prompted the attack.
The electrician, 38-year-old Avi Turjeman of Kiryat Gat, said he had no early contact with the assailants.
"I had no argument with them and did not talk to them," he noted. "They attacked me from the back, one hitting me in the head and hand with the hammer, and the other helping him near the door. I managed to grab the hammer and jump out of the window."
An initial police investigation revealed that the two workers were brought to the site from the city of Tayibe by a contractor. It was their first day at work. The contractor left the workers alone with the electrician when the incident occurred.
The contactor was taken in for questioning by the Kiryat Malachi Police, in order to inquire whether the two had an Israeli work permit.
Naomi Lev-Avi, an eyewitness, said that she had heard shouts and screams from the building's yard.
"Suddenly I saw the guy jump out of the window with a hammer in his hand. He was injured in the head and was bleeding. His thumb was crushed and he began running. The Arabs escaped as well. The Jewish worker fell on his back at first, and I believe he was injured."