Commander of Armed Police Battalion-14 Mohammad Iqbal confirmed the matter.
Yusuf was a resident of Camp-9. There were three murder cases against him, the APBN commander said.
After the incident, around 5 am on Wednesday, ARSA members attacked the RSO in Camp-15. During this time, an RSO member named Arafat was stabbed to death by ARSA men. APBN-8 commander Amir Zafar confirmed the incident.