The death toll from a devastating truck bomb in Kabul’s diplomatic quarter last week has jumped to more than 150, President Ashraf Ghani told an international peace conference in the capital on Tuesday.

Kabul has been on edge since the bombing in the highly fortified area on May 31, 2017, the deadliest in the city since 2001.

“Over 150 innocent Afghan sons and daughters were killed and more than 300 wounded were brought to hospitals with burns and amputations,” Mr. Ghani said. Previously officials had put the number of dead at 90.

Four more people were killed on Friday when hundreds of protesters incensed by the bombing clashed with police, prompting officials to force them back with live rounds fired in the air, tear gas and water cannon.

The protesters, holding a sit-in for a fifth day on June 6 near the bombing site, have demanded the resignation of Afghanistan’s security chiefs, including national security adviser Hanif Atmar — a demand that Mr. Ghani has turned down.

And on Saturday, at least seven people were killed when suicide bombers tore through a row of mourners who were attending the funeral of one of the protesters, the son of an influential Afghan senator.

No group has claimed the attacks, but the government has blamed the Taliban-allied Haqqani Network for the May 31 bombing.