The Taoiseach will join world leaders in Paris to discuss how to tackle the organisation and promotion of terrorism via online platforms.
The joint summit is being hosted by France and New Zealand, and comes in the wake of the terror attacks in Christchurch in March.
Meanwhile, Facebook has announced new restrictions on its livestreaming services in a bid to avoid it being used to "cause harm or spread hate".
Lawmakers in the US state of Alabama have passed a bill to outlaw almost all abortions with no exceptions.
The state Senate approved the law, rejecting an amendment to allow exemptions for cases of rape or incest.
Abortion would only be allowed in certain circumstances to safeguard the mother's health.
The new law represents the most restrictive abortion ban in the US - potentially setting up a future Supreme Court battle over the court's landmark Roe v Wade decision on abortion laws.
A Sinn Féin private members motion, seeking a referendum to put the right to housing into the Constitution, looks set to be defeated tomorrow.
Last night the party's spokesperson on housing, Eoin Ó Broin, introduced the proposal for the 35th Amendment, which would see the right to adequate, appropriate, secure, safe and affordable housing added.
However, Fianna Fáil have indicated they won't support the motion because it would cost too much to hold a referendum.
Downing Street says Theresa May's planning to bring her Brexit withdrawal agreement back to the UK parliament in three weeks.
She met Jeremy Corbyn last night to tell him she wants another vote during the first week of June.
MPs have already rejected the deal several times.
Young people are frustrated at the pace of change around how sex is taught in schools, according to Youth Work Ireland.
The group is launching a petition today, aimed at urging the Government to speed up the process.
The organisation, which works with thousands of young people across the country, says religious ethos in schools is a particular barrier.