European Union members today agreed on new measures against Iran over its supply of drones to Russia, the Czech presidency of the EU said.

"EU ambassadors agreed on measures against entities supplying Iranian drones that hit Ukraine," the Czech EU presidency said in a tweet.

"EU states decided to freeze the assets of three individuals and one entity responsible for drone deliveries (and) is also prepared to extend sanctions to four more Iranian entities that already featured in a previous sanctions list."

Meanwhile, Minister of State for European Affairs Thomas Byrne has said more sanctions against Russia over the war in Ukraine are under consideration.

Speaking on RTÉ's Today with Claire Byrne, he said there must be unanimity in the EU on sanctions, which there has been to date.

Mr Byrne said the EU is doing as much as it can to help Ukraine defend itself.

"And that's really, really important so that (Russian President Vladimir) Putin gets the message that this war will only bring ruin not just to Russia, but to him," Mr Byrne said.

He said the details of Ireland contributing troops to the EU Battle Force are being worked out.

He said Ireland has engaged with these missions over recent years, it would be part of our triple lock and would have to be approved by the Dáil.

"Our Defence Forces will be doing a role essentially to protect civilian populations and civilian infrastructure to give some training to the Ukrainian military," he said.

Read more: 'Kamikaze drones': What are the weapons Russia is using in Ukraine?

On Ireland's neutrality, Mr Byrne said: "We must assess if we are prepared financially to defend ourselves with our own army and our own Defence Forces without even considering anything else."

"Our neutrality has served us very, very well but we've also got to think, how do we protect the island?

"How do we protect our critical infrastructure and where do we get the best co-operation of that?"

He said Ireland is not politically neutral in Ukraine but is militarily neutral in that we are not part of a military alliance.

He said there are no plans "whatsoever" to join NATO but we have given support to Ukraine.

"We've given military support, albeit of the non-lethal type and we've given very practical support in terms of their path of joining the EU and to the refugees here," he said.

"It’s a complex issue and it's not just as simple as Throwing out the Iraq war, which we wanted nothing to do with, and NATO, in fact, wasn't really part of it all."