A discarded hand grenade was discovered in the Phaya Thai district yesterday.
The M67 fragmentation grenade was found by a street sweeper at a bus stop near the Manulife Building on Sri Ayutthaya Road.
The bomb squad was called in to recover the device. Police said they expected it was discarded by someone spooked by a police checkpoint nearby, Bangkok Post reported.
Investigators are seeking suspects from security camera footage.
