At least 70 charities linked to the war in Gaza have been referred to police by a watchdog over potential criminal activity, The Mail on Sunday can reveal.

The Charity Commission said criminal investigations could take place into groups 'supporting different sides of the Middle East conflict'.

Police are understood to be investigating offences such as fraud, theft, inciting religious hatred or supporting terrorism.

The watchdog has opened more than 300 regulatory cases involving charities with an Israeli or Hamas focus in the past 18 months.

A Freedom of Information request revealed about a quarter – at least 70 – were referred for investigation.