SINGAPORE, June 18 -- Prominent warning signs at Chestnut Nature Park in Singapore caution mountain bikers and hikers about nearby live-firing areas, yet some continue to enter restricted zones.

On June 15, a man was hit in the back by a bullet slug while cycling with friends in a gazetted live-firing area within the Central Catchment Nature Reserve (CCNR), located between the Upper Seletar and Upper Peirce reservoirs.

The Straits Times reported that the Singapore Armed Forces (SAF) had been conducting an exercise at its Nee Soon Range, about 2.3km from the site of the incident.

"It is very safe. Some families bring their elderly and kids to hike inside too, there is nothing much to be worried about," said a cyclist known only as Han, ...