Kabul: Joy and celebration turned into horror and carnage when an Islamic State (IS) suicide bomber targeted a packed Afghan wedding hall, killing at least 63 people in the deadliest attack to rock Kabul in months, officials and witnesses said on Sunday.

The massive blast, which took place late on Saturday in west Kabul, came as Washington and the Taliban finalise a deal to reduce the US military presence in Afghanistan and hopefully build a roadmap to a ceasefire.