Nearly 1,000 civilians have been killed since the start of the conflict mid-April
Seventeen people - five children - have been killed in an air strike in Sudan's capital, Khartoum, officials say.
Twenty-five homes were destroyed in Saturday's strike in the densely populated Yarmouk district.
It came a day after a top army general threatened to step up attacks against the paramilitary Rapid Support Forces.
Fighting between the Sudanese army and the RSF broke out mid-April as a result of a vicious power struggle within the country's military leadership.
In early June, the RSF claimed full control of Yarmouk, an area of the capital which houses an arms manufacturing facility.
Precise figures on the number of people killed in the fighting are difficult to establish, but it is believed to be well over 1,000, including many civilians caught in the crossfire.
Roughly 2.2 million people have been displaced within the country and more than half a million are sheltering in neighbouring countries, according to the UN.
Several ceasefires have been announced to allow people to escape the fighting but these have not been observed.
The recent attack targeted civilians in Mayo, Yarmouk, and Mandela areas, according to the RSF. The army has not commented.
Tens of thousands of civilians have fled across the border into neighbouring Chad.
Doctors and hospitals there have been overstretched and struggling to cope.
The violence has also resurrected a two-decade-old conflict in Sudan's western Darfur region.
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