African heads of state have pledged to coordinate efforts to improve the continent's security and defeat jihadist organisations, particularly in Nigeria and the Sahel region, during talks on Monday at the 31st African Union summit held in Mauritania's capital.French President Emmanuel Macron arrived in Nouakchott on Monday to discuss the battle against Islamic extremism and ways to finance counterterrorism and peacekeeping operations.Mauritanian President Mohamed Ould Abdel Aziz met Macron at the airport, and praised the French president for his "work for the development of the region and the fight against terrorism and insecurity".Aziz said that relations between Mauritania and France have made "significant progress in several vital areas such as defence and security, energy and health in particular".He said Macron has supported the newly formed G5 Sahel regional force that has become an important framework for coordinating efforts to promote development and to fight against extremism, organised crime and illicit trafficking.* Sign up to News24's top Africa news in your inbox: SUBSCRIBE TO THE HELLO AFRICA NEWSLETTER FOLLOW News24 Africa on Twitter and FacebookMacron was to meet with the presidents of the G5 Sahel group, which includes Mauritania, Niger, Mali, Chad and Burkina Faso."This exchange will be an opportunity for me to mark my commitment to renew the link between France and the African continent, between Africa and Europe but also to rethink this link in a concrete way, as we are doing between others on issues of security, counterterrorism and education," said Macron.He said that concrete decisions would be made during Monday's meetings about the redeployment of forces and their positioning for the comings months.The meeting comes as al-Qaida's Mali branch claimed responsibility for three attacks in three days in Mali. The first was on Friday at the G5 Sahel military headquarters, then on Saturday there was a land mine attack on Malian soldiers and on Sunday a suicide bomb aimed at French soldiers, but which killed four civilians. Both presidents condemned the attacks.Aziz on Sunday said that Africa urgently needs a comprehensive approach to deal with extremist attacks that takes into account the cultural and economic issues that are the root causes of the violence.At the close of the summit, African leaders adopted a series of decisions with at least 49 countries signing a treaty for the African Continental Free Trade Area. Other decisions were made to work toward the eradication of corruption and the reform of AU institutions along with recommendations to help areas of tension including South Sudan."Africans have shown that they can meet the challenges and drive their progress," said African Union and Rwandan President Paul Kagame. He said that countries must stay on track "to achieve better results against corruption, and toward our economic integration".The African Union summit, on Sunday and Monday, was set up to address the issue of corruption and to discuss a mechanism to return stolen money, which is largely placed in tax havens abroad. The AU says approximately 70% of income from Africa's resources are squandered or diverted.Speaking on Monday of France's relations with Mauritania, Macron stressed that "bilateral relationship between our two countries is not limited to security, even though it is extremely important", adding that he hopes that "we can continue to intensify relations in terms of development projects and economic links". More than $46m will go to development projects through the French Development Agency in Mauritania, he said.