The ongoing crisis in Mali is having far-reaching effects in West Africa and the Sahel, and the situation there illustrated the fragility of the region, a UN envoy said here Friday.

"As developments unfold in Mali, the risks for infiltration and destabilization are real in some of the countries bordering Mali, as illustrated by the efforts of neighboring countries to tighten security along the borders," the UN secretary-general's special representative for West Africa, Said Djinnit, said while briefing the UN Security Council.

Djinnit, who heads the UN Office for West Africa (UNOWA), said the situation in Mali has heightened the overall terrorism threat in the subregion, adding that the international community must remain mindful of the limitations faced by Mali's neighbors, and enhance support in the areas of border control and counter- terrorism.

The crisis in Mali broke out last January as fighting between government forces and Tuareg rebels took place in northern Mali, which was seized by radical Islamists.

The renewed clashes in north Mali, as well as the proliferation of armed groups in the region, drought and political instability in the wake of a military coup d'etat in March have uprooted hundreds of thousands of civilians.

According to the latest estimates by the UN High Commissioner for Refugees (UNHCR), more than 150,000 people have fled to neighboring Mauritania, Niger and Burkina Faso, while an additional 230,000 have been internally displaced.

The conflict has strained resources and worsened the humanitarian situation in the Sahel, which was already precarious due to years of drought, piracy, and transnational organized crime. It also prompted the Malian government to request military assistance from France to stop the progression of extremist groups.

In addition, the Council last month authorized the deployment of an African-led International Support Mission in Mali, known as AFISMA, for an initial period of one year to assist the authorities in recovering rebel-held regions in the north and restoring the unity of the country.

Djinnit, who in recent months has traveled to Mali, Burkina Faso, Nigeria and Cote d'Ivoire supporting mediation efforts by the Economic Community of West African States (ECOWAS), stressed that the international community must simultaneously support both the political and military tracks to ensure a successful transition process.

"It will also be necessary to eventually pursue a broad reconciliation process that strengthens the foundations for national cohesion in Mali," Djinnit said. "The recently deployed UN Team in Bamako will be fully available to support this process, and I will personally continue to support these efforts."

He also noted that beyond the crises in Mali and the Sahel, the region continues to be threatened by piracy and armed robbery at sea in the Gulf of Guinea, disrupting maritime trade roots and economic progress in the region. Tensions along the borders between Liberia and Cote d'Ivoire, and transnational organized crime in Guinea-Bissau and Mali are also a source of concern.

UNOWA is engaging with governments as well as civil society organizations in the region and other partners to address these issues, Djinnit said, welcoming the progress made so far.

"The situation in West Africa remains at a crossroads. On the one hand, the leaders of the region have made significant progress towards the promotion and consolidation of peace, and are taking decisive efforts to address the pressing challenges to peace and security in the region," he said.

"On the other hand, the situation in Mali and in the Sahel, combined with other cross-cutting threats in the region, including drug trafficking and piracy, has the potential to undermine security in West Africa, while the root causes of instability in the region are yet to be fully addressed," he added.

The envoy stressed that continued attention and support of the international community, in particular the Security Council, to ECOWAS leaders and countries remains essential towards lasting peace, stability and development.