MANILA, Philippines - Police warned the public on Wednesday against the new operation of a robbery group which attacks its victims by hitting them first on the head before carting away their valuables.

The warning came after a 25-year-old assistant supervisor of a restaurant fell victim to the group early Wednesday morning in Intramuros, Manila.

Supt. Romulo Sapitula, chief of the Manila Police District Station 5 (Ermita), said the victim, Arnulfo Amor, was walking home from work at around 2 a.m. when three men approached him at the corner of Magallanes and Sta. Potenciano Streets.

The victim claimed one of them suddenly hit his head with a huge stone. As he fell to the ground, the suspects took his P5,000 cash and fled immediately.

Police said some residents in the area who witnessed the incident alerted the barangay officials and this resulted in the arrest of two of the suspects.

They were identified as Erwin Tagle, 26, and Mario Rodriguez, 45.

Tagle is now detained at the MPD station 5, but Rodriguez managed to escape while undergoing medical examination at the Ospital ng Maynila.

Police are now on the hunt for the two other suspects.