Sambhal Violence: What led to violent clashes, curfew that left five dead?

Clashes broke out during a survey of a mosque in Sambhal, Uttar Pradesh. Five people died. Several others and police were injured. The survey followed a claim that the mosque was built on a temple site. Authorities restricted entry to Sambhal. Internet services were suspended. A ban on stone and flammable material collection was imposed. Arrests were made.