The fighting between Thailand and Cambodia exposes the depth of global arms proliferation in South-East Asia, proving more sophisticated and deadly than experts expected.

Armed clashes on the remote, disputed border between Cambodia and Thailand killed at least 12 people on Thursday, in a dramatic escalation of tensions that threatens to erupt into a broader conflict.

Thailand and Cambodia have agreed to a ceasefire following days of border clashes which claimed dozens of lives and displaced nearly 300,000 people.