Ofer, 61 was bludgeoned to death with metal rods and axes outside his home in the isolated Jordan Valley community Brosh Habika late Thursday night.
Hours after the attack, acting on intelligence information, Israeli security forces arrested a number of Palestinian suspects. Three of the suspects are from the village Dir-Tzamet near Hebron, the Shin Bet said Sunday.
Odah Farid Taleb Haroub, 18, and Bashir Ahmed Odah Haroub, 21, reportedly confessed to killing Ofer with others, Ma'ariv said. The two told investigators they visited Ofer's home two weeks earlier, but failed to carry out the attack, the Hebrew daily said.
Ofer's wife, Monique, was hospitalized after undergoing knee surgery for an injury suffered as she crawled through thick foliage to the main highway to summon help.
The Shin Bet said details revealed by the suspects matched information Monique told investigators concerning a number of Palestinians who she said arrived at their home two weeks ago under suspicious circumstances.
The exact motive for the killing has yet to be determined, security officials told Israel Radio.
Ofer, a retired army colonel was killed 40 years to the day after his brother Yitzhak, a former air force pilot, was shot down in his helicopter over the Golan Heights during the 1973 Yom Kippur war.
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