Police said workers of a affair in the cardinal affiliation came beneath an armed advance while they were hoisting flags on electricity poles on the Natha Khan bridge.
Panicked drivers approved to about-face aback from the bridge, causing a cartage jam at both ends.
According to police, the shootout lasted over 30 minutes, befitting the cartage on a application of Sharea Faisal suspended.
No blow was reported, Shah Faisal Colony SP Tanvir Alam Odho said.
A abrupt cartage gridlock was handled afterwards deployment of badge backed by Rangers in the area.
He said the activists were hoisting flags on electricity poles after any badge aegis and no acumen for the affray had been ascertained.