An Al-Qaeda-linked jihadist alliance claimed responsibility today for an attack on a tourist resort near Mali's capital that left five people dead, including members of a European Union mission to the country. The Group to Support Islam and Muslims, a fusion of jihadist groups with previous Al-Qaeda links, said in a statement three of its "martyrs" had killed Westerners in yesterday's assault on the Kangaba Le Campement resort. The group, also known as Jamaat Nusrat al-Islam wal- Muslimeen in Arabic, said the attackers were from the Fula ethnic group and battled for "many hours" at the popular eco- lodge near Bamako, which it termed a site of "debauchery". Their statement was quickly picked up by extremist monitor SITE and two Mauritanian news agencies known for reporting on the region's jihadist activity, after being posted on the group's Telegram channel. Three foreigners, a Malian civilian and a Malian soldier were killed in the latest high-profile assault in north and west Africa targeting locals and tourists, including in neighbouring Burkina Faso and Ivory Coast. Witnesses said EU and UN staff raised the alert to speed up the deployment of Malian and French special forces when the shooting began at Kangaba. Some assailants had shouted "Allahu Akbar" (God is Greatest), according to other witnesses interviewed. EU foreign affairs chief Federica Mogherini, speaking in Luxembourg, confirmed two of the victims were EU staff, a Portuguese soldier who was training troops in the Malian army and a Malian woman. Also Watch: Prosecutor Boubacar Sidiky Samake said other victims were a Chinese man, a Malian woman and a Portuguese man who died from bullet wounds, while a man from Cameroon died of a heart attack at the scene. Samake also announced that a criminal investigation has been opened and that Kalashnikovs, a pistol and ammunition had been retrieved from the site of the attack. At least four suspected jihadists have been placed in custody while four attackers were killed during the incident, Security Minister Salif Traore told AFP. Traore said 36 hostages, mostly French and Malian, were freed, but around 20 members of Mali's special forces remained at the eco-lodge today. Kangaba is known to be popular with expatriates. The Portuguese soldier who died was among off-duty members of the EU's army training mission in Mali, and of MINUSMA, the United Nations peacekeeping force in the country. A Kangaba employee described ushering clients into a hiding place, a possible explanation for the relatively low death toll compared with the lives lost in previous assaults on tourist targets in west Africa. Among those saved Sunday were two Spaniards, two Dutch and two Egyptian nationals, according to the security ministry. Domestic and foreign forces deployed in Mali's troubled north and centre have been repeated targets of jihadist forces, but attacks on civilians in and around the capital are rare, with the last major incident in November 2015 when gunmen stormed the Radisson Blu hotel in Bamako. Samake said today that the Kangaba attack "bore all the hallmarks" of the Radisson Blu assault. That siege, which left 20 people dead, led to the government imposing a state of emergency which has been in place more or less ever since. Earlier this month, the US embassy in Bamako had warned about "a possible increased threat of attacks against Western diplomatic missions, places of worship" and other places frequented by Westerners.