At least 10 policemen reported injured in explosion near city headquarters of Justice and Development Party.An explosion in the Turkish city of Istanbul near the country’s ruling party’s headquarters, has injured at least 10 policemen, the Turkish state news agency reports.Istanbul police chief Huseyin Capkin said an explosive device was placed on a motorcycle and set off by remote control as a police vehicle drove past, near the Justice and Development Party (AKP) building and the offices of a conservative business association."As a police vehicle carrying 21 officers was passing by, a remote control bomb on a motorcycle exploded.