The Government has announced a 10 cent cut in excise duty on petrol and diesel, with a further reduction of 2.4 cent on marked gas oil or green diesel.
The measures, which are subject to approval, are due to take effect from midnight on Tuesday and will remain in place until the end of July.
The planned increase in carbon tax has also been deferred until budget day in October, in what the Government says is a response to rising fuel costs.
Announcing the measures after an emergency Cabinet meeting this evening, Taoiseach Micheál Martin said the protests in recent days went beyond peaceful demonstration, warning no group has the right to block roads, ports or emergency services.