The US is asking the United Nations to remove the Venezuelan government's credentials and formally recognise self-proclaimed interim President Juan Guaido as the country's leader.
The UN Security Council held an emergency meeting on the deteriorating situation.
Nick Harper reports from New York:

US and Iran signal peace deal near despite differences over terms
Trump says Iran war deal close as Strait of Hormuz tensions linger
Victims' families mark Air India crash anniversary with prayers and tributes
Ebola outbreak spreads to crowded displacement camp in Congo
Fire breaks out at New Zealand's Wellington airport, disrupting flights
