BASRA, Iraq (AP) — Angry protesters stormed the Iranian consulate in the southern city of Basra on Friday, setting a fire inside amid a wave of demonstrations that have turned deadly in the past few days, a security official and eyewitnesses said.

At least 10 protesters have died in clashes with security forces since Monday, including three who were shot dead by security forces on Thursday night as protesters lobbed Molotov cocktails and set fire to a government building and offices of Shiite militias in the city.

The protests in Basra and other cities, the most serious to shake Iraq's oil-ric...