However , as part of this , they encountered IS forces dug in around the Tabqa Dam , west of Raqqa city .
The SDF , moving to take Raqqa , positioned themselves around the city as part of the second phase of the operation .
As part of this , SDF encountered IS forces dug in around the Tabqa Dam , west of Raqqa city .
The SDF , moving to take Raqqa , positioned themselves around the city as part of the second phase of the operation .