Thousands of people are celebrating the San Fermin Festival in the Spanish city of Pamplona by running alongside charging bulls.
The festival of San Fermin, the patron saint of Pamplona, is one of Spain's most famous fiestas which attracts tens of thousands of revellers from across Spain, and further afield.
Daredevil runners traditionally wear red scarves and white tshirts, train all year long to race alongside the bulls that weigh more than half-a-ton each.
Each year over 200 runners are injured in the bull run, either from falling or being trampled or gored by the bulls.
On Monday, two Britons and one American were seriously hurt.
The last person to die at the festival was three years ago.