MANILA - The Philippine National Police (PNP) has identified the lone gunman in the attack at Resorts World Manila last Friday.

Sources from the PNP also confirmed on Sunday that they have already interviewed the gunman's family who positively identified the shooter.

They said the identity and background of the lone gunman strongly suggests robbery and not terrorism was the motive behind the attack.

The PNP sources said the gunman was a Filipino but they declined to give more details. The PNP said it will hold a press conference this morning.

• TIMELINE: Resorts World Manila attack

The attack at Resorts World Manila has left at least 37 people dead.

Most of the victims died "due to suffocation at the second floor gaming area, which had been set on fire by the perpetrator."

The gunman, meanwhile, managed to make his way to the 5th floor, where he forcibly entered a hotel room and burned linen along the hallway.

Investigators said the gunman locked himself up in a room, where he set himself on fire before shooting himself in the head.