Eleven people are confirmed dead and others remain missing after the collapse early Wednesday of a pair of residential buildings in the western Indian city of Baroda, a police spokesman told Efe.

As many as 14 families were asleep inside the three-story structures when they collapsed at 4:30 a.m., the spokesman said.

Media outlets say around 30 people remain unaccounted for, while authorities decline to cite any numbers.

"My family was in the building. My uncle, my aunt and their two children. I don't know where they are, they don't answer the telephone," one man said.

Residents blamed the accident on the poor quality of materials used when the buildings were constructed in 2001, adding that nearby structures are also in poor shape.

A structure built without a permit in the Mumbai suburb of Thane collapsed in April, leaving 74 people dead. EFE