Three million Muslim pilgrims today symbolically stoned Satan in a valley near the Saudi Arabian holy city of Mina - part of the last, and most dangerous, rite of the annual hajj.
In previous years the sheer number of people swirling around the pillars has led to stampedes - with 244 people killed in 2004 and 360 fatally injured the following year.
Saudi authorities subsequently built the current concrete complex to reduce the danger, and have so far not reported any injuries from this year's event.
