The two detectives were sitting inside a police vehicle when a bullet smashed through the windscreen and whizzed past, missing their heads by inches.
Despite coming under fire, the policemen continued to chase a fleeing gang until they wounded and arrested one suspect at Godwit Street near the Gordon police barracks.
NCD Central Commander, Anthony Wagambie Junior, said the detectives came across a suspicious Mark 2 sedan at Godwit Street in Gordon and followed the car to the Unagi Oval when they were attacked with two factory made pistols.