Three other Thai workers injured in the same attack had been discharged by doctors, he said.
Israeli media reported that the four wounded Thais worked on a farm in Ein Habesor City near the border with the Gaza Strip, about 100 kilometres from Tel Aviv. They were taken to a hospital in Be’er Sheva by helicopter.
Thani said diplomats from the Thai Embassy in Tel Aviv had been dispatched to the hospital to help the injured workers.
The group worked in Israel legally and their employers had already taken care of the medical expenses.