PEOPLE V. MENGOTE - 210 SCRA 174
Information was given about three suspicious looking persons. A surveillance team was then deployed. Upon seeing that the men were looking side-by-side and one holding his abdomen, the policemen approached the group and the latter tried to run away. The suspects were then searched wherein a handgun and fan knife was seized. It was found later on that the handgun was part of those stolen from a house wherein a robbery was staged.
A person may not be stopped and frisked in broad daylight on a busy street on mere unexplained suspicion.