Defending Twenty20 World Cup champions Pakistan have suffered a major blow, as fast bowler Umar Gul and all-rounder Yasir Arafat have been ruled out of the Twenty20 World Cup in the West Indies due to injuries.

Gul, Pakistan's leading wicket-taker in the previous two editions of the Twenty20 World Cup, hurt his shoulder during a training camp at the National Cricket Academy in Lahore earlier this month, while Arafat is struggling with a calf injury.