ATHENS – The motive unknown, Greek police investigating the brazen broad daylight shooting death of TV journalist Giorgios Karaivaz, who covered organized crime and the police, are talking to witnesses who saw it happen.

The two witnesses, not named, were near the scene and told authorities that two men drove by on a motor scooter as Karaivaz got out of his car near his home in the Alimos neighborhood, one the rear seat opening fire.

Karaivaz was hit 10 times including two final shots to the head as he lay on the ground and with reports a municipal crew pruning trees nearby had seen the attack, the men quickly fleeing.

The driver was said to be wearing a helmet or cap and the co-driver was wearing a military jacket and a surgical mask, and the weapon likely a 9-millimeter gun muffled with a silencer, said Kathimerini.

Forensic teams found 13 bullet casings at the scene, the paper said, the witnesses reportedly saying the first shots were fired while the assailant was still on the scooter before he got off and delivered the final head shots.

Police said they believe Karaivaz was followed by the suspects after he left an appearance on a show on Star TV and that it was a professional hit as they are looking into his stories and subjects for clues to a motive as to why.