Israeli police say a Palestinian home has been set on fire near the site of an arson attack that killed three Palestinians last year.

Police spokeswoman Luba Samri says the suspected arson attack took place early Sunday in the West Bank village of Duma.

Palestinian officials say attackers broke Ibrahim Dawabsheh's bedroom window and set the house on fire. Dawabsheh is a relative of last year's victims and a key witness to the attack. He is testifying before an Israeli court in the suspected perpetrators' trial. He was unharmed but his wife suffered from smoke inhalation.

Last July, suspected Jewish settlers hurled firebombs into a home, killing 18-month-old Ali Dawabsheh. His mother, Riham, and father, Saad, later died of their wounds. Ali's 4-year-old brother Ahmad survived.