The Libyan National Army (LNA) assault on Tripoli is developing into a protracted siege with casualties rising as air strikes and missile attacks become more common. According to the World Health Organisation, by 28 April 345 people had been killed and 1,652 wounded in this new phase of fighting. Other reports said about 30,000 people have been displaced since combat activities resumed. The conflict is still concentrated on the capital and oil production has not yet been affected, but threats to the sector are increasing all the time.