Shelling killed three people in the flashpoint Democratic Republic Congo city of Goma ahead of a visit by UN leader Ban Ki-moon on Thursday, the United Nations said.
Three shells were fired into the Goma district of Ndosho late Wednesday, killing three people and wounding 10, according to the UN humanitarian coordinator for DR Congo Moustapha Soumare. He did not say whether rebel or government forces were behind the shelling.
Ban visited Goma on Thursday as part of a tour of the region to bolster an accord seeking to end conflict in eastern DR Congo.
Goma was briefly taken by M23 rebels in November 2012. The rebels remain just outside the city and have been involved in new clashes with government forces since Monday.
"Civilians have been injured during military operations because military positions and military actions are taking place too close to where civilian populations are located, a violation of international humanitarian law," Soumare said in a statement.