In the latest act of cruelty, the most radical jihadist group fighting in Syria on Sunday killed a 102-year-old man along with his whole family, a monitoring group told AFP.

The 102-year-old was shot dead in his sleep by jihadist rebels from the Islamic State of Iraq and the Levant (ISIS).

The rebels also killed the man’s son, his grandson, his great-granddaughter and her mother, the Syrian Observatory for Human Rights told the news agency.

All the victims were Alawites, members of the same offshoot of Shiite Islam as Syria’s President Bashar Al-Assad.

ISIS killed the family while attacking Zanuba village in Hama, said the Observatory.

“Some members of the family were burned alive, others killed in their sleep,” it added.

Since joining the civil war in Syria, ISIS has been accused of torturing and murdering prisoners, among them children and teenagers, and forcing Druze men to convert to Islam or die.

In one case, members of the group beheaded a person they said was a member of an Iraqi Shiite militia fighting for Assad, only to discover they had accidentally beheaded a fighter belonging to an allied rebel group.

In March, the group live-tweeted the amputation of a hand of a man charged with theft in the northern province of Aleppo.

The group also carries out frequent public executions, with some victims reportedly crucified in Raqa.

In recent months, the group has been targeted by rival rebel groups, among them other Islamist groups, who have teamed up to fight ISIS, which they have warned is even worse than Assad’s regime.

In an attempt to win over the hearts of Syrians, ISIS has been holding stand up comedy shows and handing out toys to local children.