The United Nations mission in South Sudan has confirmed that a UN peacekeepers' camp was among targets bombed by Sudanese warplanes amid border clashes between the two countries' armed forces.

Kouider Zerrouk, spokesman for the UN Mission in South Sudan (UNMISS), said on Monday that there had been no casualties in Sunday's attack.

But a South Sudanese information minister said that seven civilians had been killed and 14 others wounded in an attack on Mayom, while the region of Bentiu was also bombed.

Gideon, the minister, Gatpan said that two bombs had fallen in the UN camp, destroying a generator and a radio.

Bombing raids on Sunday also killed nine civilians in South Sudan's Unity border state, Gatpan said.

Al Jazeera's Harriet Martin, reporting from Khartoum, said that "bombings have targeted sites like bridges by which people cross into Sudan from the South".