An opposition lawmaker in Congo's capital has been killed, as the country prepares for national polls on Monday.

Police say gunmen attacked Marius Gangale, a provincial assembly representative, in Kinshasa Tuesday night. The local official was inside a vehicle with his wife when the shooting took place.

Police say they are investigating whether the shooting was a random crime or politically motivated.

The Democratic Republic of Congo is set to hold presidential and parliamentary elections November 28, the second national polls since the end of a brutal civil war.

Since campaigning began late last month, supporters of rival Congolese parties have clashed several times.

The United States, European Union and United Nations have expressed concern about election-related unrest and violence, and the International Criminal Court has said it will prosecute any perpetrators of election-related crimes.

President Joseph Kabila faces a divided opposition in the upcoming poll.

Mr. Kabila has been president since 2001, when he took office after the death of his father, Laurent. He won the country's last presidential election in 2006.