The US is offering a $20m reward for information leading to the arrest of an Iranian man accused of plotting to assassinate Donald Trump’s former National Security Advisor John Bolton.

Shahram Poursafi, a member of Iran’s Islamic Revolution Guard Corps (IRGC), is accused of trying to hire criminals in the US to kill Mr Bolton, a vocal Iran critic, in exchange for $300,000.

The reward announcement comes in the same week that Trump said he had been briefed by US intelligence about an alleged Iranian assassination plot against him.

Iran has previously denied orchestrating any plots to assassinate Trump officials or interfere in US affairs.