An office building as well as nearby barracks were destroyed, with 25 nearby homes affected, reports said.
Images of the incident show a destroyed warehouse, a damaged military truck and a child with gashes being treated by medics. Multiple explosions can be heard on unverified social media video.
“The incident of the ammunition explosion on April 27, 2024… was a technical issue because the weapons are old, faulty, and the hot weather,” Cambodia’s defence ministry said in a statement, according to AFP.
Prime Minister Hun Manet has said he was “deeply shocked” by the blast. He said authorities would cover funeral expenses and pay compensation of $20,000 (£16,000) to the families of those killed, while injured soldiers will get $5,000, he said.