The talks, hosted by US diplomat Dr Richard Haass, were aimed at resolving issues around flags, parading and the past.
Commenting on the talks, Prime Minister David Cameron said:
Although it is disappointing the parties have not been able to reach full agreement at this stage, these talks have achieved much common ground, providing a basis for continuing discussions.
There is a shared commitment to making progress on these very difficult issues that continue to be a focus for tension and division across the community.
I urge the parties to keep going. I also want to thank Dr Richard Haass and his team for their dedicated work.
The government and the Northern Ireland parties will continue to work together to strengthen further the foundations for peace, stability and prosperity in Northern Ireland.
Read more about how we’re supporting political stability and the institutions in Northern Ireland.
Published 31 December 2013