Jerusalem - Israel is to fly a first planeload of South Sudanese deportees home on Sunday with more expected to follow later in the week, a spokeswoman for the Population and Migration Authority said.
"We have about 150 so far (for Sunday's flight)," Sabine Hadad told AFP on Wednesday. "We want more planes (to go) during the week."
On Tuesday, the authorities arrested 100 illegal immigrants, while another 300 people agreed to be repatriated voluntarily, she said, without saying which countries they were from.
She had no updated figures for Wednesday morning's raids.
Since the current wave of arrests began at dawn on Sunday, 240 people have been detained for deportation, most of them South Sudanese.
Official figures show there are 60,000 Africans living in Israel illegally, most of them in run-down neighbourhoods of south Tel Aviv.
Until last week, the estimated 1,500 South Sudanese living in Israel were protected from deportation by a policy which afforded them "temporary protection."
But last Thursday, a Jerusalem court overturned that long-standing policy, ruling that they were no longer at risk in their homeland and clearing the way for their mass expulsion.