US sends aircraft carrier and bomber task force to 'warn Iran'

The US has deployed an aircraft carrier to the Middle East to send a "clear and unmistakable message" to Iran.

John Bolton, US national security advisor, said they were acting "in response to a number of troubling and escalatory indications and warnings".

The deployment of the warship was based on claims of a possible attack on US forces, Reuters news agency reports, quoting an unnamed US official.