An explosion has killed four people in a Sudanese Red Sea port city, officials said Sunday, the latest in a series of violent incidents in the area. Tensions have been simmering in recent days in Port Sudan, where anti-government protesters have reportedly blocked roads over rising insecurity. Local media have linked the unrest to rejection by the Hadendoa tribe of an October peace deal between rebel groups and the government. The Hadendoa, the largest subdivision of the Beja people in the region, fear their tribe will be under-represented in regional legislative and executive bodies under the agreement. Saturday’s blast took place late in the evening at a busy sporting club in Port Sudan, the provincial capital of the Red Sea state and the country’s main port, and also involved an armed attack. “An explosive device went off at Al-Amir club… killing four people,” the Central Committee of Sudan Doctors said in a statement. Three others were wounded after being shot or stabbed, it added. Witnesses said the attack was carried out by armed men on a motorcycle, but it was not immediately clear what motivated it. Authorities said Sunday that one of the alleged perpetrators had been arrested. Dozens of people later gathered outside the public prosecutor’s office in Port Sudan demanding the assailants be brought to justice, witnesses said. On Sunday, Prime Minister Abdalla Hamdok held an emergency cabinet meeting in which demanded “strict security measures” to contain the violence. Saturday’s explosion was the latest in a series of violent incidents in Port Sudan, including an attack Friday by unidentified assailants on security forces. On Saturday a man was killed during a fight on a public bus, and that same day there was a failed bid to attack a hotel with explosives, authorities said. A government statement said that five people were killed on Saturday alone, while six others were wounded in recent unrest. The doctors’ committee, an independent union of medics, called the violence “tribal strife”, and urged security forces to step in. Sudan has been led by a transitional civilian-military administration following the April 2019 ouster of Islamist president Omar al-Bashir, who ruled Sudan with an iron fist for 30 years. The country has since been undergoing a rocky period marked by a wrenching economic crisis and deepening political division.