The constables were killed on the spot after being shot from close range in their heads by motorcycle-borne attackers yesterday, a senior official told PTI.
"The attackers on a motorcycle fired from close range and sped away, giving no time for the constables to retaliate," said DIG (West) Feroze Shah.
Taking stock of the situation, IG Sindh A D Khawaja suspended area's head traffic police for not having the slain policemen, who were without weapons and bullet proof jackets, ready for the attack.
Last month seven policemen on duty were gunned down in two separate incidents in the Orangi town area in a matter of minutes. In September, a traffic police constable was shot dead while two others were injured in an armed attack.
According to official figures around 80 policemen, including nine traffic constables, were killed in targeted shootings in the city last year.