Diplomats say the U.S., Britain, France and Germany now seek to refer Iran to the U.N. Security Council for failure to comply with its nuclear nonproliferation obligations.

The trip by the Americans follows a meeting with Russian President Vladimir Putin in Moscow on Saturday, as both sides have escalated their aerial attacks.

Volcanic ash spread across parts of Jakarta and Lampung province on Sumatra’s southern tip, Indonesia’s Center for Volcanology and Geological Hazard Mitigation said.

Building collapses are a recurring hazard in parts of India during the June-to-September monsoon, when heavy or prolonged rain can weaken ageing structures.