Mourning in Istanbul

ISTANBUL — Turkish officials blamed illegal construction practices for the collapse of an apartment building in Istanbul as they joined hundreds of mourners Saturday at a funeral for nine members of one family killed in the disaster.

As the overall death toll rose to 18, Turkish President Recep Tayyip Erdogan said there were “many lessons to learn” from the tragedy. He said the government would take “determined” steps after investigators complete their work and called for speedy urban renewal.

The eight-story residential building collapsed in the city’s Kartal district Wednesday. By Saturday, Interior Minister Suleyman Soylu increased the death toll to 18. He said rescuers had reached another person under the rubble, who was thought to be dead.

Murat Kurum, Turkey’s minister for environment and urban planning, said the collapsed building had permits for only six floors. He said someone had illegally built its top two floors with low quality concrete and sea sand instead of construction-grade concrete and stronger steel.

“In this area, we have faced a very serious problem with illegal businesses like this done to make more money,” Erdogan told reporters on his first visit to the site.

Experts say a majority of buildings in Istanbul lack proper licenses and are built illegally or without engineering services.

AP/EMRAH GUREL Relatives grieve Saturday in Istanbul during funeral prayers for nine members of a family killed in the collapse of an apartment building Wednesday. Turkish officials at the service blamed illegal construction practices for the collapse that so far has claimed 18 lives.