Pakistani officials say gunfire and grenade attacks left at least 10 people dead Wednesday in the ongoing political and ethnic violence in the southern port city of Karachi.

Officials say a former lawmaker from the ruling Pakistan People's Party was among those killed.

Karachi, Pakistan's largest city, has seen a surge of violence in recent weeks. Officials say more than 200 people were killed in July alone.

Authorities say the killings are part of clashes between the main political groups, which represent two different ethnic communities. The political parties are also said to have links to armed criminal gangs.