Buildings on the Greek island of Kos sustained structural damage from the earthquake, the city’s mayor, Giorgos Kyritsis, told state-run Greek media.

People try to move the cars from a flooded coastal road after an earthquake on the Greek island of Kos early Friday, July 21, 2017. A powerful earthquake struck Greek islands and Turkey's Aegean coast early Friday morning, damaging buildings and a port and killing people, authorities said. (Kostoday.gr via AP)Expand / Collapse
People try to move the cars from a flooded coastal road after an earthquake on the Greek island of Kos early Friday, July 21, 2017.  (Kostoday.gr via AP)
"The buildings affected were mostly old and were built before the earthquake building codes were introduced," Kyritsis said.

The coast guard announced the island's port was part of the structural damage.