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How can I tell whether an old object is an unexploded landmine? You cannot reliably determine that from appearance alone. If an object could be a mine or other munition, treat it as dangerous: do not approach or touch it, carefully leave by the route you used to enter, and report it to local authorities from a safe place.
Why appearance cannot tell you it is safe
A possible landmine may be difficult to identify, and a suspicious object may instead be another kind of military munition or a component. Rust, age, damage, partial burial, small size, or an incomplete appearance does not prove that it is harmless. The U.S. Army says ordnance can be clean or rusty, exposed or buried, and complete or in parts—and should be considered dangerous regardless of size or age. The U.S. Army Corps of Engineers (USACE) also warns that munitions may become more dangerous with age.
Do not use a photo, online guide, or closer inspection to make a safety determination. USACE says munitions can be easy or hard to identify; recognition means noticing a possible hazard, not diagnosing what the object is.
What to do if you find a possible mine or munition
Follow the safety sequence described by USACE as Recognize, Retreat, Report. Do not return to the object to confirm its identity or get a better look.
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1. Recognize the possibility
If an object could plausibly be a mine, shell, grenade, or other munition, assume it may be dangerous. You do not need to identify its type before acting.
2. Retreat without disturbing it
Do not approach, touch, move, disturb, or collect the object. Carefully leave the area by the route you used to enter. Do not go closer to take a photograph or place a marker on or near it. Official general guidance does not set one retreat distance for every situation, so follow any instructions from local authorities.
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3. Report it from a safe place
Once away, contact the appropriate local authority. Give the location and a general description based only on what you already saw; do not return to gather details. USACE directs people in the United States to call 911. Outside the U.S., contact local police or emergency services, or a local mine-action authority where one exists. Emergency numbers and reporting arrangements vary by country.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Common questions about old or rusty ordnance
Is a rusty old shell safe?
No appearance-based judgment can establish that it is safe. Treat a rusty, damaged, partly buried, small, or incomplete object that could be ordnance as dangerous and leave it alone.
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What if someone has kept it for years?
Past handling or long-term storage does not establish safety. USACE warns that a munition kept for years can still pose an explosive hazard. Do not move or disturb it; report it to authorities.
Should I mark the spot?
Do not approach the object or return to place a marker. USACE advises noting the area once safely away; Army guidance says to mark the general area rather than the munition if possible. Make no attempt to do so if it would require going back toward the object.
Quick Recap
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Official safety guidance
- USACE: 3Rs of Explosives Safety Information describes recognizing a possible munition, retreating without disturbing it, and reporting it; its 911 direction is for the United States.
- USACE New England District: Explosive Safety explains identification limits, age-related danger, and reporting.
- U.S. Army: Unexploded Ordnance (UXO) Safety describes the varied condition and appearance of ordnance and advises treating it as dangerous regardless of age or size.
- UNMAS: Safety advice for individuals advises against approaching or touching mines, unexploded ordnance, abandoned ordnance, improvised explosive devices, or other suspicious objects, and against collecting military hardware.
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