It said heavy fighting started at midnight in the region dividing the two warring factions , with the PUK aiming to break through to KDP 's headquarters in Salahuddin .
<response> It said heavy fighting started at midnight in the region dividing the two warring factions , with the <organization>PUK</organization> aiming to break through to <organization>KDP</organization> 's headquarters in <location>Salahuddin</location> . </response>