On Monday Iran said it had responded to the latest US proposal and that exchanges with Washington were continuing.

One of the six Americans believed to have been exposed is experiencing symptoms, according to media reports.

Live broadcasts from the Global Sumud flotilla show commandos boarding several boats trying to breach the Gaza maritime blockade.

Key roads have remained largely empty and some schools have asked students to stay at home.

The freight train collided with a bus in Bangkok, killing eight people and injuring dozens of others.

An outbreak in DR Congo has been declared a health emergency, with almost 250 suspected cases reported.