Couple in Wiltshire in critical condition
Another UK nerve agent attack?
Police say they are unsure how a couple in Wiltshire fell ill but are keeping an open mind. Dawn Sturgess and Charlie Rowley are in critical condition.
They were initially treated as overdoses but medics soon became alarmed that it could be something more sinister. The areas where they had recently visited have been cordoned off.
There's no reason to think the couple were targeted, reports say, but they may have inadvertently came into contact with something malicious.
If tests return any signs of chemical weapons, it could re-inflame tensions between the UK and Russia.
