Gunfire, explosions and overhead fighter jets were heard across Sudan’s capital Khartoum, as gunmen reportedly stormed the homes of people working for the United Nations and other international organizations, amid conflicting reports of an agreed ceasefire in the country, writes CNN.

Fighting between the country’s armed forces and the paramilitary Rapid Support Forces (RSF) is in its fourth day in Khartoum both near the army command and the presidential palace, and close to two RSF bases to the north and west of the capital. Attempts at a truce crumbled late on Tuesday as clashes re-erupted between both factions in central Khartoum, just hours after they agreed on a 24-hour ceasefire, which went into effect at 6 p.m. local time (12 p.m. ET), according to witnesses.

Residents remain trapped in the middle elsewhere in Sudan; Medical charity Médecins Sans Frontières (MSF) said a lack of medical supplies, blood and electricity are threatening lifesaving treatments in Sudan, adding that 11 have died from their injuries in North Darfur and the western region’s the last running hospital has received dozens of wounded patients in the past 48 hours.

At least 270 people have been killed and more than 2,600 injured in the unrest, according to the World Health Organization officials citing Sudan’s Ministry of Health Emergency Operations Center. Armed personnel raided the homes of UN staff and employees of other international organizations in downtown Khartoum, according to reports in an internal UN document seen by CNN.