An Israeli air strike has destroyed a 13-storey residential block in the Gaza Strip, triggering a Hamas threat to fire 130 rockets into Tel Aviv and its suburbs. Israel threatened yet more air strikes and has tanks massed on the border of Gaza in the worst escalation in violence since 2019. Israel last invaded Gaza in 2014 to stop rocket attacks. Video footage showed three plumes of thick, black smoke rising from the tower, its upper storeys still intact as they fell. The tower houses an office used by the political leadership of Gaza’s Hamas rulers. Electricity in the area around the building went out and residents were using flashlights.