At least three active members of the security forces were killed by the East Tyrone Brigade during this period. Among the killed were two constables shot dead while driving a civilian type vehicle in Fivemiletown's main street on 12 December 1993. A British Army Lynx helicopter was fired on over the surroundings of Fivemiletown in the aftermath of the ambush. Another fatality was a Royal Irish Regiment (RIR) soldier, Private Christopher Wren, killed while off-duty by a booby-trap planted in his car near Moneymore, County Londonderry, on 31 May 1993, just a few miles from Cookstown. Another soldier died in a fratricide incident in Fivemiletown on 9 May 1992, in the aftermath of an IRA bomb attack in the area, as mentioned above.