In January 1967, there were mass riots between the NLF and their rival FLOSY supporters in the old Arab quarter of Aden town. This conflict continued until mid February, despite the intervention of British troops. On 20 June 1967, 23 British Army officers were ambushed and shot dead by members of Aden Police during the Aden Mutiny in the Crater District.  During the period there were as many attacks on the British troops by both sides as against each other culminating in the destruction of an Aden Airways DC3 plane in the air with no survivors.