Reports said security was deteriorating in Karachi, where thousands poured on to the streets to protest. At least three banks, a government office and a post office were set on fire, a witness said.

Tires were set on fire on many roads, and shooting and stone-throwing was reported in many places. Most shops and markets in the city shut down.

At least 20 vehicles were torched in the central Sindh town of Hyderabad.