POLICE were granted a further 36 hours to question a 19-year-old man in connection with the murder of Bradford Pc Sharon Beshenivsky.
Yusuf Jama is being held at undisclosed West Yorkshire police station after his arrest in Birmingham on Saturday.
Pc Beshenivsky was shot dead and Pc Teresa Milburn wounded while investigating a robbery at a Bradford travel agents.
Jama, who was first held in connection with an alleged serious sexual assault, was today being quizzed on suspicion of murdering Pc Beshenivsky, 38, the attempted murder of Pc Milburn, 37, and the robbery of the travel agents in Morley Street.
Pc Beshenivsky left a husband, three children and two stepchildren.
Detectives are continuing to hunt for two men suspected of murdering Pc Beshenivsky.
Mustaf Jama, 25, and Muzzaker Imtiaz Shah, 24, are still on the run.
On Friday police released pictures of the men, who were living in London, and appealed for the public's help in catching them.
They also issued CCTV pictures of a silver Toyota car that may have been used in the robbery.
Yusuf Jama was arrested when police swooped at a house in inner city east Birmingham on Saturday morning as the result of an "incident".
He was not held at first in connection the murder of Pc Beshenivsky, West Midlands Police said, but was detained along with nine other men in connection with an allegation of a sexual assault on a woman.
Pc Milburn was released from hospital a week ago.
Five Somali men and a woman arrested in London in the aftermath of the shooting were released without charge.
The men were all bailed pending further inquiries and the woman was freed without charge.