The troops were part of a Southern African Development Community (SADC) mission deployed in 2023 to help the Kinshasa government quell unrest in the mineral-rich eastern region.

"President (Lazarus) Chakwera has ordered the Malawian Defence Force commander to begin preparation for the withdrawal... to honour the declaration of a ceasefire," Chakwera's office said late on Wednesday.

The move was also to allow for "planned negotiations towards a lasting peace", it added.

It was not immediately clear when the troops would begin the drawdown.

South Africa dominates the SADC force, which is estimated to number around 1,300 troops, with Tanzania also contributing soldiers.

On Tuesday, M23 declared a unilateral humanitarian "ceasefire" just days after capturing the strategic city of Goma in North Kivu.

But intense clashes broke out at dawn on Wednesday, pitting M23 and its Rwandan allies against Congolese armed forces, security and humanitarian sources told AFP.

M23 fighters and Rwandan forces seized the mining town of Nyabibwe, about 100 kilometres (60 miles) from Bukavu, capital of south Kivu province;,and 70 kilometres from the provincial airport.

Leaders from the 16-nation SADC and the eight-country East Africa Community are due to meet on Saturday, in a bid to broker peace between the warring parties in the DRC.

DRC President Felix Tshisekedi and Rwandan President Paul Kagame are expected to attend the summit in Tanzania after no-shows at previous talks.

The United Nations Human Rights Council is due to hold an urgent session on the DRC conflict on Friday.

At least 900 people were killed in the Goma clashes and 2,880 wounded, according to the UN's humanitarian body.

International observers have warned of a looming humanitarian crisis in the east of the country.