Manila, Philippines (CNN) A 6-year-old girl was among three people killed when a 6.8-magnitude earthquake struck the southern Philippines island of Mindanao on Sunday.

The girl was inside her family's house when the building collapsed and killed her, the province's governor, Douglas Cagas, told CNN.

The quake struck the island of Mindanao and its largest city, Davao.

Fire Service director Chief Superintendent Samuel Tadeo confirmed the three deaths and said a market in Padada had collapsed.

The country's second-largest island is a popular tourist destination, and videos posted on social media showed hotel pools dramatically overflowing and mass evacuations of shoppers from malls.

Residents reported schools had been severely damaged -- luckily empty of students at the time, as the quake happened on a Sunday. Gov. Cagas of the island's Davao del Sur province said a three-story building had collapsed.

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