Detectives investigating the fatal shooting of Pc Sharon Beshenivsky have arrested two men in Birmingham.
The men were arrested in a flat above this shop in Sparkbrook
West Yorkshire Police arrested the men during a joint operation with West Midlands Police in the Sparkbrook area of the city.
They are being questioned in Birmingham in connection with firearms offences.
The arrests came a day after hundreds of people paid tribute to Pc Beshenivsky as her funeral was held at Bradford Cathedral.
The 38-year-old was killed as she investigated an armed robbery at Universal Express Travel Agents in Morley Street, Bradford, on 18 November.
Her colleague Pc Teresa Milburn, 37, was also injured in the shooting.
Pc Sharon Beshenivsky was shot while on duty in Bradford last year
Yusuf Jama, 19, and 24-year-old Muzzaker Imtiaz Shah are due to face trial in June, charged with Pc Beshenivsky's murder.
Police are still hunting Mr Jama's 25-year-old brother Mustaf in connection with the shooting.
He is believed to have links with Sheffield, Birmingham, Coventry and Leicester, although police said he could be anywhere in the country.
Rewards totalling £90,000 are being offered for information leading to the arrest and conviction of the people behind the crime.