Two Jewish extremists were indicted on Sunday for a deadly West Bank arson attack on the home of a Palestinian family in July that helped reignite a fresh cycle of violence in Israel and the Palestinian areas.
Amiram Ben Uliel, a 21-year-old native of Jerusalem, was formally charged with murder enacted with "racist motives."
A second suspect, whose name was withheld as a 17-year-old minor, was charged with aiding murder, Israeli police spokeswoman Luba Samri said.
Jewish extremists six months ago hurled a firebomb into the home of the Dawabshe family as they were sleeping in the northern West Bank village of Duma, south of the city of Nablus.
An 18-month-old toddler, Ali, immediately died. His parents and 4-year-old brother were severely injured.
The father and mother later died from severe burns they sustained in an attempt to save their children.
Graffiti in Hebrew, including the word "revenge," along with a Star of David, were sprayed on the walls of the home.
The attack sparked international outrage and was severely condemned by leaders on both sides.
Israel has faced criticism for failing to bring the perpetrators to justice.
Police said in a statement it had made the investigation and tracking down the attackers a top "national" priority.
Two other members of the same "Jewish extremist infrastructure" were also indicted Sunday at the Lod District Court near Tel Aviv over other nationalist-extremist crimes.
Lawyers have accused the Shin Bet internal security organization of violating the rights of the suspects.
The Shin Bet has vehemently denied any wrong doing, including allegations of "torture" and "sexual abuse," charging the lawyers are trying to "blacken" its name, foil the investigation and divert attention from the real crime.
Extreme right-wing attorney Itamar Ben-Dvir reiterated the charges on Sunday.
"There was abuse here, there were sodomy torture beds, there were all kinds of things here that shouldn't happen in a democratic state," he told reporters at the court.