BANGKOK, Aug. 6 -- Thai police have seized more than 200 pieces of drone-related equipment from a warehouse operated by a Singaporean company in Samut Prakan, as authorities investigate possible threats to national security, the Bangkok Post reported.

The raid, carried out yesterday, followed a tip-off from the National Broadcasting and Telecommunications Commission (NBTC) about aerial vehicle signals detected in the area.

In its report, the English-language daily saidinvestigators traced the signals to TRD Systems Pte Ltd, a Singapore-registered firm.

Police said the operation led to the confiscation of 29 drones, 38 signal detectors, 129 signal-jamming guns, 16 jamming devices, a van equipped for detecting and disrupting signals, and...