What is the fine-grained topic of the following text: However, the checkpoints in Basay, San Jose, Vallehermoso, Siaton, Jimalalud, Bacong, Valencia, Amlan, Zamboanguita and Guihulngan City only managed to recover the ten guns purportedly thrown on the road by motorcycle riders who evaded capture. Only return the topic.
Recovery of discarded guns at checkpoints