Update (2110 EST): IDF have withdrawn from Silwan after arresting one suspect.
Update (1954 EST): CCTV cameras captured the moment the shooter open fired on the passenger bus.
The number injured has risen to 8 as police have pursued 2 suspects into Silwan.
6 injured, 2 critical, and 4 routine have been reported by emergency services after a gunmen attacked a group of worshippers on a bus between Shear Hashupat and Mount Zion. The gunman is still at large.
This is developing.