The pair - who are working alongside the SAS as officers in the Special Reconnaissance Regiment (SRR) - were travelling with locally recruited spies when they were pulled over at an Islamic State checkpoint near the Syrian border.
When their inquisitors' suspicions grew, the women claim to have become embroiled in a gun fight, leaving several extremists dead before escaping with their vehicle almost completely destroyed.
A defence source told the Daily Star: 'These women are probably the most deadly in the armed forces.
'They are extremely fit, intelligent and very professional. They handled themselves really well and have proved to be just as good as the men in every respect.
'They were really up for the fight once they were compromised.'
The two women - both in their mid-20s - have been in the war-torn region for months, putting their lives at serious risk drafting local women to help with their intelligence led operations.
Earlier this month they were travelling to meet a potential recruit as part of an SAS convoy when ISIS fighters stopped them in their tracks. Read More HERE