A 6.4-magnitude earthquake strikes southern Taiwan

A 6.4-magnitude earthquake struck southern Taiwan early Saturday, causing at least two buildings to collapse.

The Taiwanese news website ET Today reported that two buildings toppled in the southern city of Tainan and that some water and gas utility pipes had ruptured. Sirens were wailing as city authorities responded to the quake, the news website said.

The temblor struck about 4 a.m. local time, or 2000 Friday GMT. It was located some 22 miles southeast of Yujing, and struck about six miles underground, according to the U.S. Geological Survey.

It was felt as a lengthy, rolling shake in the capital, Taipei, on the other side of the island. But Taipei was quiet, with no sense of emergency or obvious damage just before dawn.