Kabul, Afghanistan (CNN) -- A man claiming to be the Afghan soldier who killed three British troops this week contacted the BBC to say he acted alone, the British broadcaster reported Friday.
The man said he was angry at the conduct of British troops in the southern province of Helmand and accused them of killing civilians, the BBC said.
Britain's Ministry of Defence said Friday it was aware of the claim.
"Whilst we cannot comment on the legitimacy of this individual's claims to be the suspect responsible for this cowardly attack, it is ridiculous to suggest that we are engaged in suicide attacks or are deliberately killing civilians," the defense ministry said in a statement.
"Insurgents and those who are against the coalition mission in Afghanistan routinely make false and exaggerated claims and so care must be taken not to accept their accounts at face value."