RAF aircraft have also continued very active air operations against Daesh targets inside Syria. On Monday 11 January, a Reaper identified a terrorist check point – one of the methods used by Daesh to attempt to impose their will on the civilian population – and successfully attacked it using a Hellfire missile. The following day [Tuesday 12th January], Reapers maintained surveillance over the oilfields in eastern Syria which have been targeted by coalition air strikes, including by the RAF, to deny Daesh the ability to use the oil to finance their operations. The Reapers identified a mechanical excavator which was being used to attempt repairs, and an oil pump which had evidently been brought back on line, and destroyed both with Hellfire missiles. In north-eastern Syria, Tornado GR4s meanwhile patrolled in the area of Al Hasakah, where they used Paveway IVs to strike two Daesh-held strongpoints.