Donald Trump: words appear to signal that there may not be an immediate US response to the incident. Photograph: Erin Schaff/New York Times

US president Donald Trump has said “Iran made a very big mistake” in shooting down a US drone, increasing tensions and talk of possible open conflict.(...)

Gen Amir Ali Hajizadeh,  Iran’s head of the Revolutionary Guards’ aerospace division, looks at debris from a downed US drone  in  capital Tehran on Friday. Photograph: Meghdad Madadi/AFP/Getty Images

US president Donald Trump has said he cancelled a planned military strike on Iran on Thursday night because it was “not proportionate to shooting down(...)