The slip road that links the Santa Venera bypass to December 13 Road in the direction of Valletta was closed to rush hour traffic this morning after a large boulder crashed down, blocking the way.
No injuries were reported and the police said that the boulder, which broke into several pieces, might have been dislodged as a result of the heavy rainfall overnight.
The incident created a traffic jam on the Santa Venera bypass and the south-bound Sta Venera tunnel.
The rocks have now been removed and traffic is flowing smoothly.